I'm running WordPress 3.2.1 on a CentOS box and I'm getting reports from my writers saying they get HTTP 500 errors when they try to update an exciting post.
I've tried the same and have similar problems (although the HTTP 500 only shows in Chrome, Safari and Firefox simply give me a blank window).
I've increased my log level on my httpd install to debug but I still can't find any errors in the logs....
The same box is running another website as well, also using WordPress (same version) and this site is not displaying these symptoms.
All suggestions on how to resolve this are more than welcome!
EDIT: I should also add that I've already tried increasing the PHP Memory in wp-config.php (up the 64MB) but the problem still occurs)
(I'm double-posting this between here and serverfault as I'm not sure wether the problem is related to the server itself or to wordpress...)