Just great how Adobe manage to screw up something that was working just fine. 
After reading Den Ivanov’s post I wanted to make a comment but it became so big I decided to make a post about it myself;
Apart from the bug Den describes there are tons more. I also have troubles with the panels who very often lose their “titlebar” in which case it’s impossible to close them or switch to other tabs in that panel. The only way to restore them is to close and open the panel (hit F4 twice).
There also is a bug in the sizing of the help window as it often resizes to the height of the screen making it impossible to read the complete content. 
It’s a shame they release a version that is even more buggy than it’s alpha version. Flash 9 is almost the same as version 8 (apart from the as3 compiler) and yet they manage to screw up the IDE.
Too bad the alpha version of Flash 9 couldn’t handle components because it was much more stable than this buggy crap. 
I really hope they fix these bugs (they are definitely not eastereggs like Den said) in the next update…
Yeh things start wigging out when the app has been open a long time. The new pallette system is killer but after a while it just floats above everything. It is also pretty lethargic after being open a while, although FLash8 seemed to have the same problem.
I’m glad i’m not the only one…