I download a fair number of songs through the iTunes music store, and about an equal number just off torrents. I am trying to create a playlist of songs from both sources, which I have been able to do in the past. However, recently, iTunes has started locking up on playlists like these (it may do it on others, but this is just an example.) So, I thought maybe it was a problem with the songs downloaded from the Torrents that are locking up iTunes. So I tried to burn an album with just downloaded songs, and they worked (both Snow Patrols "Eyes Open" and Chili Peppers "Stadium Arcadium") went off with no problem.
And now that those work, I am totally stumped as to what in the playlists I am making is having iTunes crash at the end of the "checking playlists" part of the burn process.
I do have the most recent version of iTunes as well