Updated all my plugins, including SuperEdit .
(Great plugin btw.)..
Updated WP to 3.1, and now my visual edit menus are gone and the edit window shows nothing (well seems the letters are white on white background).. till I click on "HTML", then I see the html code for the content.
I tried disabling SE , and then Activating it, also changing settings and updating... short of removing it from my WP .....
When SE is disabled, I get my basic visual WP tool bars back.
I have 5 sites, all are doing it, 3 different themes...
Same hosting, some different servers.
using FF 3.6.13
Reading you bug report, tried toggling the visual editor under user profile, it wasn't checked, checked it, lost the visual editor as expected, went back removed the check, got the visual editor back, but still just a clear edit window, no tool bar.
so far the only thing that "fixed" it and I get back the visual editor tool bar and content in the edit window is by disabling SE.