I posted about this in another thread, but in retrospect creating my own would have been a better idea. So that's what I'm doing. ;)
I have a user running a wordpress site which was until recently on 3.0.5. One of the managers had a quite incredible lapse in judgment a while ago and gave this user direct access to the server, so before I knew anything about it he had upgraded both test and production environments to 3.1. Predictably enough, the upgrade broke a few things, and I'm now trying to find out why the tinymce rich-text editor is failing to load.
The exact nature of the problem is the same as described by a user here, the tinymce box displays the markup of the page in the same colour as the background so it becomes visible when selected, and when the 'html' tab is clicked and then the 'visual' tab is clicked again, the markup becomes visible normally. I don't know what the RTF editor buttons actually look like when they're working, but either way they're not there.
I have tried all the troubleshooting options suggested in the master thread, i.e. disabling all plugins and reverting to the original theme, but so far nothing I've tried has made any difference at all.
Hoping someone can help me, so I can get this user off my back! :P