After svn up'ing my test installation, I get an HTTP 500 (Internal Server Error) for every request to api.php. Apache's error log says "Premature end of script headers: php-cgi.exe" (that's right, I'm on Windows and am running PHP as a CGI). Strangely, index.php works just fine. I'm pretty sure this is caused by something introduced in the past week (it worked a week ago). I tried reverting the Wiki.php rewrite, but that didn't solve anything.
Unfortunately, Apache/PHP don't provide a very detailed error message (what I mentioned earlier was the entire message) so I don't have the faintest clue as to how to debug this, other than tracking by revert (reverting today's commits, then yesterday's, etc. until it starts working, then refine by the hour till I nailed the revision responsible) which I intend to do tomorrow. If anybody thinks they may have caused this, or has a similar setup and manages to debug this properly, please let me know (preferably *before* I start tracking this thing down myself).
Version: 1.13.x
Severity: enhancement