Hello over there.
I had a nice discussion over at AppleDiscussions? about that problem. I had a problem with iTunes 7.5, with 7.6 it was gone, but is re-introduced itself with 8 again.
When I watch a video on iTunes and hover over the video itself, thus bringing up the floating menu, iTunes and the whole OS is crashing down.
I could track that problem to perian, since I don't have that problem without perian. The minute I install it again, iTunes ist
crashing again! But only when hovering over the video itself while watching!
MacOS 10.4.11, NVidia Geforce 8600M GT, Perian 1.1, iTunes 8.
Apple Discussions about that problem:
http://discussions.apple.com/thread.jspa?threadID=1342948&tstart=0
http://discussions.apple.com/thread.jspa?threadID=1705994&tstart=0