My visual editor tab has not been working since the 3.5 upgrade. I have tried these things:
1. Disabled all plugins. I have 4 (JetPack, All in one Favicon, WP Super Cache, and Akismet). I do not have FeedWordPress (FWP), which has been mentioned in other threads.
2. Switched to twenty eleven theme.
3. Cleaned out all of my cache, disabled NoScript, cleared history, etc.
None of these attempts have worked. Since I'm really an amateur at web design I am not comfortable yet doing a manual upgrade that would require manually changing around the files in the wp-content folder. I'm really unsure what else to do at this point.
Is there a planned update or a patch to this?