Hello,

About half the pages of the mediawiki installation I manage (which have been working flawlessly for 2 years) recently became mangled.

I suspect a parser problem, but I'm running out of troubleshooting ideas.

Here's what I've tried : - Upgrading to latest version - Disabling all extensions - Directly checking the DB ; no data have been altered. If I try to "Edit page" without viewing it first the syntax is correct - Enabling PHP error displaying (no error whatsoever)

It seems an old bug involving Tidy on some page could produce such results, but as far as I know Tidy isn't enabled.

Installation infos : MediaWiki 1.13.4 PHP 5.2.0-8+etch13 (apache2handler) MySQL 5.0.32-Debian_7etch8-log

Example of mangled page : http://www.drillscan.com/wiki_scrambled.gif

Any ideas as to what might cause this problem ?