I am having the exact same problem as David, the original questioner for this thread. The problem began with my Dashboard’s Theme browser, as David described, and eventually the problem spread to my Dashboard’s image/media uploads. I couldn’t upload any media files by that point, even when using FTP. It got so bad that I had to delete my entire WordPress installation and the associated MySQL database, then start over again. (I backed up all of my files first.)
Now that I have installed a fresh copy of WordPress and connected it to a fresh database, the exact same problem is happening AGAIN with the theme browser in the Dashboard. I have deactivated and then deleted all plugins I had re-downloaded, but the problem persists. I could live with uploading new themes by FTP, as I had before–but I’m worried that the issue will spread across my entire Dashboard, as it did last night.
