I just updated my system to 10.6.4. It went pretty well, so I thought. Most things still work, ie. itunes and a few others. But the main ones that are broke now are,
iphoto> it crashes as soon as i try to import to library,
quicktime>crashes as soon as I try to start a video,
Toast> crashes when I drag and drop a file

So far these are only the ones I have noticed, but all since the 10.6.4 update. Anyone have any suggestions? Is there a way to downgrade?