I got a 12" PB and I am running 7B28 and Expose is running very badly on all the builds I have installed of which the 7B21 was a clean install. The mouse sticks very badly and it is very hard to move it around to select a window while at expose... anyone else having this problem? i would very much appreciate any thoughts about this.... Oh btw i just found out that if you quickly press and de press F11 the windows stay out of sight revealing the desktop super cool!!! this is one of the things i missed after leaving windows XP and i have it back!!! My switching experience gets better by the day!!!