Thanks guys. It seems that getting rid of the php-pecl-apc-3.1.15-0.3.svn329913.fc17.x86_64 and php-pear-1.9.4-7.fc17.2.noarch packages may have done the trick. I'll do some more testing to see if I can help find the source... It's looking more and more like I suspected, which is just a 'wonky ...

Hi all,

I recently upgraded a longstanding installation to V1.7, and have discovered a problem. This is likely something specific to my configuration, but I am seeing very regular core dumps on my server, and have traced them back to serendipity's serendipity_mb function in include/lang.inc.php ...