diff --git a/_misc/import.pl b/_misc/import.pl
new file mode 100755
index 0000000..f30da95
--- /dev/null
+++ b/_misc/import.pl
@@ -0,0 +1,52 @@
+#!/usr/bin/env perl
+use warnings;
+use 5.026;
+use FindBin ();
+use Path::Class qw/dir file/;
+
+# A quick and dirty script for importing stuff from webperl/master to gh-pages
+
+sub edit (&$$) {
+	my ($code,$source,$dest) = @_;
+	state $basedir = dir($FindBin::Bin)->parent->parent;
+	local $_ = file($source)->absolute($basedir)->slurp(iomode=>'<:raw:encoding(UTF-8)');
+	$code->();
+	file($dest)->absolute($basedir)->spew(iomode=>'>:raw:encoding(UTF-8)', $_);
+}
+
+edit {
+	s{ iframe.perleditor\s*\{ [^\}]* border: \s* \K \N* (?=\n) }{1px dotted lightgrey;}xmsg==1 or die;
+	s{ <!--(?<x>script\s+src="http.+?iframeResizer.min.js"[^>]+crossorigin[^>]+></script)--> }{<$+{x}>}xmsg==1 or die;
+	s{ ^ \s* \K /[/*] (?= \s* iFrameResize ) }{}xmsg==2 or die;
+} 'web/democode/demo.html', 'pages/democode/index.html';
+
+edit {
+	s{ <!-- [^>]* \K demo.html (?= [^>]* --> ) }{index.html}xmsg==1 or die;
+	s{ <!--(?<x>script\s+src="http.+?iframeResizer.contentWindow.min.js"[^>]+crossorigin[^>]+></script)--> }{<$+{x}>}xmsg==1 or die;
+} 'web/democode/perleditor.html', 'pages/democode/perleditor.html';
+
+edit {
+	s{ <!-- [^>]* \K demo.html (?= [^>]* --> ) }{index.html}xmsg==1 or die;
+	s{ <(?<x>script\s+src="[^"]*webperl\.js"\s*></script)> }{<!--$+{x}-->}xmsg==1 or die;
+	s{ <!--(?<x>script\s+src="http.+?webperl\.js"[^>]+crossorigin[^>]+></script)--> }{<$+{x}>}xmsg==1 or die;
+} 'web/democode/perlrunner.html', 'pages/democode/perlrunner.html';
+
+edit {
+} 'web/democode/perleditor.css', 'pages/democode/perleditor.css';
+
+edit {
+	my $msg = <<'ENDMSG';
+This is essentially a copy of
+https://github.com/haukex/webperl/blob/master/web/regex_tester.html
+with the following differences:
+- webperl.js from CDN
+- $RUN_CODE_IN_IFRAME enabled
+- URL updated to https://github.com/haukex/webperl/blob/gh-pages/regex.html
+(see import_regex_tester.pl)
+ENDMSG
+	s{ <(?<x>script\s+src="(?:webperl\.js|__WEBPERLURL__)"\s*></scr_*ipt)> }{<!--$+{x}-->}xmsg==2 or die;
+	s{ <!--(?<x>script\s+src="http.+?webperl\.js"[^>]+crossorigin[^>]+></scr_*ipt)--> }{<$+{x}>}xmsg==2 or die;
+	s{ ^ \s* our \s+ \$RUN_CODE_IN_IFRAME\s*=\s*\K[01](?=\s*;\s*) }{1}xmsg==1 or die;
+	s{ https?://github.com/haukex/webperl/blob/\Kmaster/web/regex_tester.html }{gh-pages/regex.html}xmsg==1 or die;
+	s{ \#\#\#\#\#\s*-->\n\K }{\n<!-- $msg-->\n}xmsg==1 or die;
+} 'web/regex_tester.html', 'pages/regex.html';
diff --git a/_misc/import_regex_tester.pl b/_misc/import_regex_tester.pl
deleted file mode 100755
index 3b330a6..0000000
--- a/_misc/import_regex_tester.pl
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/usr/bin/env perl
-use warnings;
-use strict;
-use FindBin ();
-
-# A quick and dirty script for importing regex_tester.html to pages
-
-my $infn = "$FindBin::Bin/../../web/regex_tester.html";
-my $outfn = "$FindBin::Bin/../regex.html";
-
-my $html = do { open my $ifh, '<:encoding(UTF-8)', $infn or die "$infn: $!"; local $/; <$ifh> };
-
-my $msg = <<'ENDMSG';
-This is essentially a copy of
-https://github.com/haukex/webperl/blob/master/web/regex_tester.html
-with the following differences:
-- webperl.js from CDN
-- $RUN_CODE_IN_IFRAME enabled
-- URL updated to https://github.com/haukex/webperl/blob/gh-pages/regex.html
-(see import_regex_tester.pl)
-ENDMSG
-
-( $html =~ s{ <(?<x>script\s+src="(?:webperl\.js|__WEBPERLURL__)"\s*></scr_*ipt)> }{<!--$+{x}-->}xmsg )==2 or die;
-( $html =~ s{ <!--(?<x>script\s+src="http.+?webperl\.js"[^>]+crossorigin[^>]+></scr_*ipt)--> }{<$+{x}>}xmsg )==2 or die;
-( $html =~ s{ ^ \s* our \s+ \$RUN_CODE_IN_IFRAME\s*=\s*\K[01](?=\s*;\s*) }{1}xmsg )==1 or die;
-( $html =~ s{ https?://github.com/haukex/webperl/blob/\Kmaster/web/regex_tester.html }{gh-pages/regex.html}xmsg )==1 or die;
-( $html =~ s{ \#\#\#\#\#\s*-->\n\K }{\n<!-- $msg-->\n}xmsg )==1 or die;
-
-open my $ofh, '>:encoding(UTF-8)', $outfn or die "$outfn: $!";
-print $ofh $html;
-close $ofh;
diff --git a/building.md b/building.md
index fb429e5..4c6ec77 100644
--- a/building.md
+++ b/building.md
@@ -30,12 +30,12 @@ Prerequisites
 - [Emscripten](http://emscripten.org) SDK, 1.38.10 and up,
   please see the prerequisites and installation instructions at
   <http://kripken.github.io/emscripten-site/docs/getting_started/downloads.html#installation-instructions>
-- The build script has several CPAN dependencies. One way to install them
-  is using [lazy](https://metacpan.org/pod/lazy): first,
-  install "lazy", then run e.g. `perl -Mlazy build.pl --help`.
-  Otherwise, the modules used by `build.pl` can be seen in
-  [its source](https://github.com/haukex/webperl/blob/master/build/build.pl)
-  grouped near the top of the file.
+- The build script has several CPAN dependencies. You can install these
+  via [`cpanm`](https://metacpan.org/pod/App::cpanminus) and the provided
+  `cpanfile`: `cd` to the `build` directory, then run `cpanm --installdeps .`
+  (Otherwise, see the `cpanfile` or the source of `build.pl` and install these
+  modules with the installer of your choice. Another possibility is to use
+  [`lazy`](https://metacpan.org/pod/lazy), e.g. `perl -Mlazy build.pl --help`)
 - A working Internet connection is needed for installation and the first build.
 
 
@@ -55,10 +55,10 @@ is checked out by the build script.
 Some of the central source files of WebPerl are:
 
 - [`webperl/build/build.pl`](https://github.com/haukex/webperl/blob/master/build/build.pl)
-- [`emperl5/hints/emscripten.sh`](https://github.com/haukex/emperl5/blob/emperl_v5.28.0/hints/emscripten.sh)
-- [`emperl5/perlmain_noexit_patch`](https://github.com/haukex/emperl5/blob/emperl_v5.28.0/perlmain_noexit_patch)
-- [`emperl5/ext/WebPerl/WebPerl.xs`](https://github.com/haukex/emperl5/blob/emperl_v5.28.0/ext/WebPerl/WebPerl.xs)
-- [`emperl5/ext/WebPerl/lib/WebPerl.pm`](https://github.com/haukex/emperl5/blob/emperl_v5.28.0/ext/WebPerl/lib/WebPerl.pm)
+- [`emperl5/hints/emscripten.sh`](https://github.com/haukex/emperl5/blob/emperl_v5.28.1/hints/emscripten.sh)
+- [`emperl5/perlmain_noexit_patch`](https://github.com/haukex/emperl5/blob/emperl_v5.28.1/perlmain_noexit_patch)
+- [`emperl5/ext/WebPerl/WebPerl.xs`](https://github.com/haukex/emperl5/blob/emperl_v5.28.1/ext/WebPerl/WebPerl.xs)
+- [`emperl5/ext/WebPerl/lib/WebPerl.pm`](https://github.com/haukex/emperl5/blob/emperl_v5.28.1/ext/WebPerl/lib/WebPerl.pm)
 - [`webperl/web/webperl.js`](https://github.com/haukex/webperl/blob/master/web/webperl.js)
 
 
diff --git a/democode/perleditor.html b/democode/perleditor.html
index 6bfd47c..f1e3bf5 100644
--- a/democode/perleditor.html
+++ b/democode/perleditor.html
@@ -58,10 +58,8 @@ function makeCM (textarea,plain,ro) {
 
 function runnerState (text) {
 	$('#runnerstate').text( text
-		/* not available until WebPerl v0.09-beta:
 		+ (lastExitStatus ? ' (last exit status was '+lastExitStatus+')'
 			: '') );
-		*/ );
 }
 
 function updateButtonState () {
diff --git a/democode/perlrunner.html b/democode/perlrunner.html
index 00532be..e0362cc 100644
--- a/democode/perlrunner.html
+++ b/democode/perlrunner.html
@@ -39,8 +39,8 @@ If not, see http://perldoc.perl.org/index-licence.html
 	-->
 
 <!--script src="../webperl.js"></script-->
-<script src="https://webperlcdn.zero-g.net/v0.07-beta/webperl.js"
-	integrity="sha256-jL8SB7St5ou4+hb0frK0k6VCQXsWQ1wolDrdU7i4juc=" crossorigin="anonymous"></script>
+<script src="https://webperlcdn.zero-g.net/v0.09-beta/webperl.js"
+	integrity="sha256-1RaYAh/WfDl3WZl+BDpSuSycg4x88pfkAFSxhWjBONk=" crossorigin="anonymous"></script>
 <script>
 "use strict";
 
@@ -60,7 +60,6 @@ function reportErr (err) {
 }
 
 Perl.addStateChangeListener(function (from,to) {
-	if (from==to) return; // won't be needed as of v0.09-beta
 	if (to=="Ended" && currentClient) {
 		for (var chan=1;chan<=2;chan++) // flush buffers
 			if (stdbuf[chan].length) {
diff --git a/index.md b/index.md
index 626ef58..081ebab 100644
--- a/index.md
+++ b/index.md
@@ -36,7 +36,7 @@ js('document')->getElementById('my_button')
 </script>
 ```
 
-- [**Download `webperl_prebuilt_v0.07-beta.zip`**](https://github.com/haukex/webperl/releases/download/v0.07-beta/webperl_prebuilt_v0.07-beta.zip)
+- [**Download `webperl_prebuilt_v0.09-beta.zip`**](https://github.com/haukex/webperl/releases/download/v0.09-beta/webperl_prebuilt_v0.09-beta.zip)
 - [**Get the sources on GitHub**](https://github.com/haukex/webperl)
 
 For web applications written with WebPerl, see:
@@ -49,14 +49,16 @@ Quick Start
 -----------
 
 - Prerequisites: `perl` (a recent version is recommended, e.g. v5.26 and up),
-  [`plackup` from Plack](https://metacpan.org/pod/distribution/Plack/script/plackup),
-  and [Cpanel::JSON::XS](https://metacpan.org/pod/Cpanel::JSON::XS).
+  and [`cpanm`](https://metacpan.org/pod/App::cpanminus) to easily install
+  dependencies (otherwise, see the file `cpanfile` for the dependencies and
+  use the module installer of your choce).
 
 - In a shell:
   
-      $ wget https://github.com/haukex/webperl/releases/download/v0.07-beta/webperl_prebuilt_v0.07-beta.zip
-      $ unzip webperl_prebuilt_v0.07-beta.zip
-      $ cd webperl_prebuilt_v0.07-beta
+      $ wget https://github.com/haukex/webperl/releases/download/v0.09-beta/webperl_prebuilt_v0.09-beta.zip
+      $ unzip webperl_prebuilt_v0.09-beta.zip
+      $ cd webperl_prebuilt_v0.09-beta
+      $ cpanm --installdeps .
       $ plackup webperl.psgi
       HTTP::Server::PSGI: Accepting connections at http://0:5000/
 
diff --git a/notes.md b/notes.md
index 844f1da..a441588 100644
--- a/notes.md
+++ b/notes.md
@@ -154,8 +154,8 @@ Release Checklist
 
 - Update version numbers everywhere; use `grep` to find them, for example:
   
-      $ grep -Er --exclude-dir=work --exclude-dir=.git --exclude-dir=emperl5 --exclude=emperl.* '0\.0[0-9]' .
-      $ ( cd emperl5; grep -Er '0\.0[0-9]' `git diff --numstat --diff-filter=A v5.28.0 HEAD | cut -f3` )
+      $ grep -Er --exclude-dir=hostperl --exclude-dir=.git --exclude-dir=emperl5 --exclude=emperl.* '0\.[01][0-9]' .
+      $ ( cd emperl5; grep -Er '0\.[01][0-9]' `git diff --numstat --diff-filter=ACMRT v5.28.1 HEAD | cut -f3` )
   
   At a minimum there is:
 	- `web/webperl.js` - `Perl.WebPerlVersion`
diff --git a/perl6.md b/perl6.md
index e82258e..4001baf 100644
--- a/perl6.md
+++ b/perl6.md
@@ -47,8 +47,8 @@ Quick Start
   
       $ git clone https://github.com/haukex/webperl.git
       $ cd webperl
-      $ wget https://github.com/haukex/webperl/releases/download/v0.07-beta/webperl_prebuilt_v0.07-beta.zip
-      $ unzip -j webperl_prebuilt_v0.07-beta.zip '*/emperl.*' -d web
+      $ wget https://github.com/haukex/webperl/releases/download/v0.09-beta/webperl_prebuilt_v0.09-beta.zip
+      $ unzip -j webperl_prebuilt_v0.09-beta.zip '*/emperl.*' -d web
       $ cpanm --installdeps .
       $ cd experiments ; cpanm --installdeps . ; cd ..
       $ experiments/p6/6init.pl   # this patches Perl 6 support in
diff --git a/regex.html b/regex.html
index 154163d..1b77e32 100644
--- a/regex.html
+++ b/regex.html
@@ -35,8 +35,7 @@ with the following differences:
 -->
 
 <meta name="viewport" content="width=600" />
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.0/normalize.min.css"
-	integrity="sha256-oSrCnRYXvHG31SBifqP2PM1uje7SJUyX0nTwO2RJV54=" crossorigin="anonymous" />
+<!--cacheable--><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.0/normalize.min.css" integrity="sha256-oSrCnRYXvHG31SBifqP2PM1uje7SJUyX0nTwO2RJV54=" crossorigin="anonymous" />
 <style>
 body {
 	margin: 0.4em;
@@ -110,10 +109,9 @@ textarea.samp_ta {
 </style>
 
 <!--script src="webperl.js"></script-->
-<script src="https://webperlcdn.zero-g.net/v0.07-beta/webperl.js"
-	integrity="sha256-jL8SB7St5ou4+hb0frK0k6VCQXsWQ1wolDrdU7i4juc=" crossorigin="anonymous"></script>
-<script src="https://code.jquery.com/jquery-3.3.1.min.js"
-	integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
+<script src="https://webperlcdn.zero-g.net/v0.09-beta/webperl.js"
+	integrity="sha256-1RaYAh/WfDl3WZl+BDpSuSycg4x88pfkAFSxhWjBONk=" crossorigin="anonymous"></script>
+<!--cacheable--><script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
 
 <script type="text/perl">
 use warnings;
@@ -127,6 +125,10 @@ sub pp { Data::Dumper->new([@_])->Useqq(1)->Terse(1)->Pair('=>')
 
 our $RUN_CODE_IN_IFRAME=1;
 
+# Possible To-Do for Later: Subs in preamble code produce "subroutine redefined" warnings.
+# I could think about whether there's a decent way around that.
+# Example: https://www.perlmonks.org/?node_id=1225457
+
 my $run_code_body = <<'END_CODE';
 	my (@warns,@output);
 	
@@ -161,11 +163,18 @@ END_CODE
 my $runcode_iframe;
 my $runcode_message_callback; # assume a single callback for now
 if ($RUN_CODE_IN_IFRAME) { # https://www.html5rocks.com/en/tutorials/security/sandboxed-iframes/
+	my $webperlurl;
+	$jq->('script')->each(sub { $webperlurl=$_[1]->{src} if $_[1]->{src}=~/\bwebperl\.js\z/ });
+	if (!$webperlurl) {
+		warn "Warning: Could not determine URL of webperl.js\n";
+		$webperlurl = 'webperl.js';  # probably won't work due to same-origin
+	}
 	my $iframe_html = <<~'END_IFRAME_HTML';
 		<html>
 		<head>
-		<script src="https://webperlcdn.zero-g.net/v0.07-beta/webperl.js"
-			integrity="sha256-jL8SB7St5ou4+hb0frK0k6VCQXsWQ1wolDrdU7i4juc=" crossorigin="anonymous"></scr__ipt>
+		<!--script src="__WEBPERLURL__"></scr__ipt-->
+		<script src="https://webperlcdn.zero-g.net/v0.09-beta/webperl.js"
+			integrity="sha256-1RaYAh/WfDl3WZl+BDpSuSycg4x88pfkAFSxhWjBONk=" crossorigin="anonymous"></scr__ipt>
 		<script>
 		Perl.noMountIdbfs=true; // we're sandboxed
 		</scr__ipt>
@@ -190,8 +199,10 @@ if ($RUN_CODE_IN_IFRAME) { # https://www.html5rocks.com/en/tutorials/security/sa
 		END_IFRAME_HTML
 	$iframe_html=~s#</\w+\K__(?=\w+>)##ig;
 	$iframe_html=~s/__RUNCODEBODY__/$run_code_body/;
+	$iframe_html=~s/__WEBPERLURL__/$webperlurl/g;
 	my $iframe_blob_url = js('URL')->createObjectURL(
 		WebPerl::js_new('Blob',[$iframe_html],{type=>"text/html;charset=utf-8"}) );
+	#TODO Later: Why does the message passing not work when I remove the "sandbox" attr?
 	my $iframe = $jq->('<iframe/>', {id=>'PerlEval_IFrame', sandbox=>'allow-scripts',
 		src=>$iframe_blob_url} )->hide->appendTo('body');
 	$runcode_iframe = $iframe->[0]{contentWindow};
@@ -217,14 +228,20 @@ if ($RUN_CODE_IN_IFRAME) { # https://www.html5rocks.com/en/tutorials/security/sa
 	my $start_time = time;
 	my $intid; $intid = $window->setInterval(sub {
 		if (time-$start_time>10) {
-			$window->alert("Failed to get response from Perl in IFrame, loading failed?");
-			$window->clearInterval($intid);
+			if ($window->confirm("Perl does not appear to have loaded yet, keep waiting?\n"
+			    ."(If you are on a slow connection, click OK to keep waiting.)")) {
+				$start_time = time;
+			}
+			else {
+				$window->clearInterval($intid);
+			}
 		}
 		elsif ($got_response)
 			{ $window->clearInterval($intid) }
 		else { update() }
 	}, 500);
 }
+$jq->('#loading')->text('Loading (Stage 2/2)...');
 
 sub sample_init {
 	my $samp = shift;
@@ -276,6 +293,7 @@ sub newsamp {
 	update();
 	return $samp;
 }
+#TODO: Adding samples causes the code table to grow, but not shrink when they are removed
 $addsamp->click(sub { newsamp('')->click });
 
 # $re_debug is actually a parameter to update()/actual_update(), but since
@@ -344,6 +362,7 @@ $ta_flags->keyup( \&update);
 
 js('$(window)')->on('hashchange',\&hashchange);
 
+#TODO: The auto-sizing causes the textarea to grow on Chrome mobile
 $ta_regex->on('input', sub { # autoexpand for new lines
 	$ta_regex->height($ta_regex->[0]{scrollHeight});
 });
@@ -582,7 +601,7 @@ sub hashchange {
 <div style="margin-bottom:1em;font-size:1.2em;text-align:center;"><b>Perl Regex Tester</b>
 - powered by <a href="http://webperl.zero-g.net" target="_blank">WebPerl</a> (beta)</div>
 
-<div id="loading" style="position:absolute;left:40%;font-size:1.2em;font-weight:bold;color:red;">Loading...</div>
+<div id="loading" style="position:absolute;left:40%;font-size:1.2em;font-weight:bold;color:red;">Loading (Stage 1/2)...</div>
 
 <div style="margin-bottom:1em;">
 <div>
diff --git a/using.md b/using.md
index 0275cee..6975f0e 100644
--- a/using.md
+++ b/using.md
@@ -39,7 +39,7 @@ If you plan on building WebPerl, for example if you'd like to add more CPAN
 modules, then head on over to [Building WebPerl](building.html). Otherwise, if
 you'd just like to get started quickly and work with the prebuilt WebPerl
 (includes many of the Perl core modules plus a couple extras), then download
-[`webperl_prebuilt_v0.07-beta.zip`](https://github.com/haukex/webperl/releases/download/v0.07-beta/webperl_prebuilt_v0.07-beta.zip)
+[`webperl_prebuilt_v0.09-beta.zip`](https://github.com/haukex/webperl/releases/download/v0.09-beta/webperl_prebuilt_v0.09-beta.zip)
 and unpack it. This ZIP file includes the contents of the
 [`web`](https://github.com/haukex/webperl/tree/master/web) directory of the
 source code, as well as the build products `emperl.*` (currently three files).
@@ -399,11 +399,20 @@ The states currently are:
 - `"Initializing"` - `Perl.init` is currently operating.
 - `"Ready"` - `Perl.init` is finished and `Perl.start` can be called.
 - `"Running"` - The Perl interpreter is running, `Perl.eval` and `Perl.end` may be called
-- `"Ended"` - The Perl interpreter has ended. You might receive several
-  state change notifications for this state.
+- `"Ended"` - The Perl interpreter has ended.
+  ~~You might receive several state change notifications for this state.~~
+  This is no longer the case as of WebPerl `v0.09-beta`:
+  you should only receive one event per state change.
 
 This function was added in WebPerl `v0.05-beta`.
 
+#### `Perl.exitStatus`
+
+This property should be **read only**! After Perl's state has changed
+to `Ended`, you can retrieve the exit code here.
+
+This property was added in WebPerl `v0.09-beta`.
+
 #### `Perl.stateChanged`
 
 **Deprecated** in WebPerl `v0.05-beta`. Use `Perl.addStateChangeListener` instead.