On certain pages on my VPS I get the following error. This happens with multiple VHOSTs. It has happened on both Wordpress and vanilla forums.
It only happens when I run suphp rather than normal php5.
Currently it occurs while viewing certain users profiles on vanilla forum, however it doesn't happen on all profiles.
[Mon May 07 21:43:07 2012] [error] [client ip] *** stack smashing detected ***: /usr/bin/php-cgi terminated [Mon May 07 21:43:07 2012] [error] [client ip] Premature end of script headers: index.php [Mon May 07 21:43:15 2012] [error] [client ip] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525/suhosin.so' - /usr/lib/php5/20100525/suhosin.so: cannot open shared object file: No such file or directory in Unknown on line 0