Ever since I updated to wp 3.4 I've been having 500 errors in the admin panel. The site just works fine, the admin panel doesnt.
So I managed to fix it by removing some security plugins and now everything works fine again.
Unfortunately when I reactivated this plugin, version 1.1.1 the admin panel instantly shows me a 500 error again.
Since it's shared hosting it's hard to find out exactly what's going on, but I hope you'd know a way of finding the exact cause of the problem.