I found that the error was an umlaut in the name of the author under the extension credits (I had installed the LoopFunctions extension by Carl Fürstenberg). I don't know why this made the Version page blank. Thanks, Jen did you install the google map extension, I noticed that enabling it makes your version page blank. didn't check it in deep detail though as I don't need the extension on my site. cheers, Peter On 2/2/07, Niedziela, Jennifer &lt;niedziela(a)bnl.gov&gt; wrote: ------------------------------ Message: 5 Date: Mon, 5 Feb 2007 11:24:57 +0000 From: "aretai aretai" &lt;aretaiuc(a)gmail.com&gt; Subject: Re: [Mediawiki-l] tags and template parameters To: "MediaWiki announcements and site admin list" &lt;mediawiki-l(a)lists.wikimedia.org&gt; Message-ID: &lt;5783abc70702050324x1f50fc8ct615bad0c4a6a7fb4(a)mail.gmail.com&gt; Content-Type: text/plain; charset=ISO-8859-1; format=flowed I think that would be rather extension not a template. Usually extensions use <extension></extension> tags to perform given activity. Hooks specifies details: $wgParser->setHook( "absHTML", "renderHTML" ); In this case <absHTML></absHTML> http://meta.wikimedia.org/wiki/MediaWiki_extensions_FAQ#How_do_I_write_my_o… If you want to have a template that contains a parameter then just create a: wiki/template:MyTemplate and create content like this on your page: {{{1}}} Then if you want a wikipage to make use of it just write {{MyTemplate|1="Some text"}} More details here: http://meta.wikimedia.org/wiki/Help:Template#Parameters Regards, Aretai On 2/5/07, Ittay Dror &lt;ittayd(a)qlusters.com&gt; wrote: ------------------------------ Message: 6 Date: Mon, 05 Feb 2007 13:40:19 +0200 From: Ittay Dror &lt;ittayd(a)qlusters.com&gt; Subject: Re: [Mediawiki-l] tags and template parameters To: MediaWiki announcements and site admin list &lt;mediawiki-l(a)lists.wikimedia.org&gt; Message-ID: &lt;45C717A3.4060906(a)qlusters.com&gt; Content-Type: text/plain; charset=ISO-8859-1; format=flowed aretai aretai wrote: i have written several extensions, parser functions and templates already, so this was not my question say i write a tag extension: function qwfProcessMyTag($text, $argv, &$parser) { } now, if the user uses it in a template as: <my-tag> {{{1}}} </my-tag> then $text in the function will be {{{1}}}. this will be the case regardless if the template is viewed, or a page containing it. the reason is the parser doesn't replace variables inside tags. i tried using the mArgStack variable, but apparently tags are evaluated before replaceVariables is called. so when my tag is processed, the arguments have not been set yet ittay -- =================================== Ittay Dror, Chief architect, R&D, Qlusters Inc. ittayd(a)qlusters.com +972-3-6081994 Fax: +972-3-6081841 www.openqrm.org - Data Center Provisioning ------------------------------ Message: 7 Date: Mon, 5 Feb 2007 11:56:49 +0000 From: "aretai aretai" &lt;aretaiuc(a)gmail.com&gt; Subject: Re: [Mediawiki-l] tags and template parameters To: "MediaWiki announcements and site admin list" &lt;mediawiki-l(a)lists.wikimedia.org&gt; Message-ID: &lt;5783abc70702050356x3d184be0h6087470727296929(a)mail.gmail.com&gt; Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sorry have misunderstood you. Aretai On 2/5/07, Ittay Dror &lt;ittayd(a)qlusters.com&gt; wrote: ------------------------------ _______________________________________________ MediaWiki-l mailing list MediaWiki-l(a)lists.wikimedia.org http://lists.wikimedia.org/mailman/listinfo/mediawiki-l End of MediaWiki-l Digest, Vol 41, Issue 15 *******************************************