diff --git a/debian/NEWS b/debian/NEWS
index 0f9db4ea3..7e76dd9e2 100644
--- a/debian/NEWS
+++ b/debian/NEWS
@@ -1,13 +1,19 @@
 ikiwiki (2.60) unstable; urgency=low
 
   Admin preferences are moving from the web interface to the setup file.
-  There are three new options in the setup file: locked_pages, banned_users,
-  and allowed_attachments. The admin prefs page can still be used, but
+  There are three new options in the setup file: `locked_pages`, `banned_users`,
+  and `allowed_attachments`. The admin prefs page can still be used, but
   that's deprecated, and the prefs will be hidden if a value is not already
   set. If a value is set in the web interface, you're encouraged to move that
   setting to your setup file now, since version 3.0 will remove the deprecated
   web interface.
 
+  Also, the layout of the setup file has changed in a significant way in this
+  release. Old setup files will continue to work, but new features, like the
+  new websetup interface, require a new format setup file. You can convert
+  old setup files into the new format by running 
+  `ikiwiki-transition setupformat ikiwiki.setup`
+
  -- Joey Hess <joeyh@debian.org>  Fri, 01 Aug 2008 17:02:14 -0400
 
 ikiwiki (2.52) unstable; urgency=low
diff --git a/debian/changelog b/debian/changelog
index 127c09361..5361d88f7 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -8,6 +8,8 @@ ikiwiki (2.60) UNRELEASED; urgency=low
   * Large amounts of internal config data reorg.
   * The way wrappers are defined in the setup file has changed. Old setup
     files will continue to work, for now.
+  * ikiwiki-transition setupformat can be used to convert a setup file to the
+    new format.
   * Version control backends promoted to first-class plugins.
   * ikiwiki-update-wikilist: Add -r switch to remove. Default behavior is now
     always to add.
diff --git a/doc/ikiwiki-transition.mdwn b/doc/ikiwiki-transition.mdwn
index 3290ca7e9..8b7c3579f 100644
--- a/doc/ikiwiki-transition.mdwn
+++ b/doc/ikiwiki-transition.mdwn
@@ -25,6 +25,14 @@ Note that if the page contains wiki links with spaces, which some
 older versions of ikiwiki accepted, the prefix_directives transition will
 treat these as preprocessor directives and convert them.
 
+# setupformat
+
+The `setupformat` mode converts a setup file from using a single `wrappers` block
+to using `cgi_wrapper`, `git_wrapper`, etc.
+
+Note that all comments and any unusual stuff like perl code in the setup
+file will be lost, as it is entirely rewritten by the transition.
+
 # aggregateinternal
 
 The `aggregateinternal` mode moves pages aggregated by the aggregate plugin
diff --git a/ikiwiki-transition b/ikiwiki-transition
index 3e2c89bf9..a257347a1 100755
--- a/ikiwiki-transition
+++ b/ikiwiki-transition
@@ -51,11 +51,11 @@ sub prefix_directives {
 }
 
 sub indexdb {
-	$config{wikistatedir}=shift()."/.ikiwiki";
-
-	if (! defined $config{wikistatedir}) {
+	my $dir=shift;
+	if (! defined $dir) {
 		usage();		
 	}
+	$config{wikistatedir}=$dir."/.ikiwiki";
 
 	# Note: No lockwiki here because ikiwiki already locks it
 	# before calling this.	
@@ -74,12 +74,12 @@ sub indexdb {
 }
 
 sub hashpassword {
-	$config{wikistatedir}=shift()."/.ikiwiki";
-
-	if (! defined $config{wikistatedir}) {
+	my $dir=shift;
+	if (! defined $dir) {
 		usage();		
 	}
-	
+	$config{wikistatedir}=$dir."/.ikiwiki";
+
 	eval q{use IkiWiki::UserInfo};
 	eval q{use Authen::Passphrase::BlowfishCrypt};
 	if ($@) {
@@ -100,10 +100,16 @@ sub hashpassword {
 }
 
 sub aggregateinternal {
+	my $setup=shift;
+	if (! defined $setup) {
+		usage();
+	}
+
 	require IkiWiki::Setup;
 	require IkiWiki::Plugin::aggregate;
 
-	%config = (IkiWiki::defaultconfig(), IkiWiki::Setup::load(shift));
+	%config = IkiWiki::defaultconfig();
+	IkiWiki::Setup::load();
 	IkiWiki::checkconfig();
 
 	IkiWiki::Plugin::aggregate::migrate_to_internal();
@@ -111,13 +117,48 @@ sub aggregateinternal {
 	print "... now add aggregateinternal => 1 to your .setup file\n";
 }
 
+sub setupformat {
+	my $setup=shift;
+	if (! defined $setup) {
+		usage();
+	}
+
+	require IkiWiki::Setup;
+
+	%config = IkiWiki::defaultconfig();
+	IkiWiki::Setup::load($setup);
+	IkiWiki::checkconfig();
+	
+	# unpack old-format wrappers setting into new fields
+	foreach my $wrapper (@{$config{wrappers}}) {
+		if ($wrapper->{cgi}) {
+			print "setting cgi_wrapper to ".$wrapper->{wrapper}."\n";
+			$config{cgi_wrapper}=$wrapper->{wrapper};
+			$config{cgi_wrappermode}=$wrapper->{wrappermode}
+				if exists $wrapper->{wrappermode};
+		}
+		elsif ($config{rcs}) {
+			print "setting $config{rcs}_wrapper to ".$wrapper->{wrapper}."\n";
+			$config{$config{rcs}."_wrapper"}=$wrapper->{wrapper};
+			$config{$config{rcs}."_wrappermode"}=$wrapper->{wrappermode}
+				if exists $wrapper->{wrappermode};
+		}
+		else {
+			die "don't know what to do with wrapper ".$wrapper->{wrapper}."\n";
+		}
+	}
+
+	IkiWiki::Setup::dump($setup);
+}
+
 sub usage {
 	print STDERR "Usage: ikiwiki-transition type ...\n";
 	print STDERR "Currently supported transition subcommands:\n";
-	print STDERR "	prefix_directives file\n";
-	print STDERR "	indexdb srcdir\n";
-	print STDERR "	hashpassword srcdir\n";
-	print STDERR "	aggregateinternal setupfile\n";
+	print STDERR "\tprefix_directives file\n";
+	print STDERR "\tindexdb srcdir\n";
+	print STDERR "\thashpassword srcdir\n";
+	print STDERR "\taggregateinternal setupfile\n";
+	print STDERR "\tsetupformat setupfile\n";
 	exit 1;
 }
 
@@ -136,6 +177,9 @@ elsif ($mode eq 'indexdb') {
 elsif ($mode eq 'aggregateinternal') {
 	aggregateinternal(@ARGV);
 }
+elsif ($mode eq 'setupformat') {
+	setupformat(@ARGV);
+}
 else {
 	usage();
 }