In installed WP-SuperEdit on a new blog site loaded with WP3.01
When I went to the setup page I couldn't drag the buttons on the Arrange Editor Buttons Page. Infact for a while ALL the buttons moved to the column at the right and had an error code associated with each button.
To clear the error I "reset all users and roles - default editor settings"
and eventually selected to "deactivate and remove settings" from with in the plugin settings box, now I have some functionality, but can not arrange my editor buttons at all.
I also had "fullscreen for wp superedit" installed and deactivated that as well.
Love the Plug in, hope we can get the bugs worked out