I recently upgraded all my blogs to the latest version and one of the blogs (all the rest are fine!) lost its visual editor and I cannot upload images with my posts.
The visitor side looks ok, it's just the admin side that has problems.
I tried disabling all plugins - no change
I tried re-installing the 3.1.2. via Automatic Update - no change
I completely wiped out the site and did a manual re-upload - no change
I am totally puzzled. Please help!