Yep! This was my issue. After trying every single thing I could think of, including editing the htaccess file, editing the php.ini file, and every other tip and trick on here, I called our host (CenturyLink, unfortunately) and they downgraded my php version to 5.2 and it worked flawlessly. Too bad I didn’t find this forum until after I decided to Google WordPress 3.5 and PHP 5.3 compatibility issues because the customer service rep told me about it. This should be posted more prominently.
