I am using themeforest
I was hoping the WordPress Support Team would chime in and maybe they know a fix?
For support of Themeforest themes, you really do need to go back to them as get support there.
While generic advice is always available, please be aware that no one has access to commercial themes here. And honestly we don't want access, support is part of what you paid for when you purchased your theme.
It's not for us here to undercut the theme providers business model and they should have no problem supporting you with your theme problems.
Generically speaking, Have you tried:
- deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).
- switching to the Twenty Eleven theme to rule out any theme-specific problems.
- resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.
- re-uploading the wp-admin and wp-includes folders from a fresh download of WordPress.
Also read the Master List for 3.4