same problem here. But, with a twist.
After upgraded to 3.0 the editor lost the buttons.
The strange thing is, all the buttons are working well under win+ff or win+ei8 but no buttons under mac+ any browser (ff, safari, camino, chrome). How could it be?
It is really hard, 'cause I am usually working on my post at home (workplace for work) but after the upgrade I have to stay at my workplace and use windows if I want to write a post. I am not happy.
The whole upgrade went seamlessly and the face of my blog is still the same.
I've tried everything but the thing is - it is working under win xp so I don't want to mess up with the config files or php. (and I am not a programmer )
I had this wp upgrade and Mac OS X update as well (to 10.6.4).
Now, all I suppose to say: help, please.