Actually the problems continue after the upgrade to 3.3.
I opened this new thread on suggestions by others.
My web site itself appears to work fine, however, in admin mode I cannot edit posts:
The edit window remains empty.
When trying to add a new post I can type a new title, but when I type text in the edit window the text remains invisible. It shows up only when the text area is highlighted. It can be published, however, and the text shows up on the published site.
Add media does not work at all.
There are no editing icons available.
When trying to edit an old post the editing windows also remains visually empty. When highlighting the window the html code and other text shows.
There is no difference between Visual and HTML windows.
In Dashboard mode some other functions do not work either. E.g. selecting Screen Options or Help do not respond.
Selecting "all" plug-ins for a bulk action does not select (act on) anything.
Dragging widgets only highlights text but the widgets do not move. I have already widgets defined but I am not able to show them. The whole Widget area seems to be frozen and is unresponsive.
These problems suddenly appeared after publishing a post yesterday afternoon (EST), just before the update to 3.3. appeared. Upgrading to 3.3. did NOT resolve the problem. There are no error messages.
Deactivating the plug-ins did not resolve the problems.
Selecting one of the default themes did not resolve the problems.
Activating the Hotfix did not resolve the problem.