Well, the crashes look fairly simiar.. I tend to doubt that OpenGL or OpenAL is causing the crash, but I am casting a suspicious eye at DivX6. I suggest removing it from your Quicktime plug-ins and restarting, and seeing if it runs. It's a long shot...
Also, it should be noted that apps DO crash. But it depends on how "often" often is.. if in the course of 6 hours of straight use it happens more than once or twice, IMO, that's "often". If it's once every couple days, that's not "often".
EDIT: Also, clear your caches.. trash the contents of /Library/Caches/ and ~/Library/Caches/ and restart.