Wikimedia Bugzilla is closed!

I have installed the GeSHi syntax highlighting extension on my wiki. The page source looks like this:

----------------------------------
== Installation ==
=== File 1 ===
<php>
...
<h1>Blah</h1>
...
</php>

=== File 2 ===
...
----------------------------------

When that code is rendered, the html codes are escaped properly and the <h1> is not counted as a heading either in 
the TOC or the section counter. (If you haven't seen it in use, the output just looks like a color-coded 
<pre><nowiki>..</nowiki></pre> section, which does work properly btw.)

However, it IS counted on the edit page. e.g. If I click edit for File 2, the link is action=edit&section=3 
(correct). But what is displayed for editing is this:

----------------------------------
<h1>Blah</h1>
...
</php>
----------------------------------

(Section 2 is File 1 up to that <h1> tag and section 4 is File 2.)

Other extensions with heading tags in them have the same problem, but I tried it with <math> (just to test a built-
in tag) and had no problem.