I deleted the old bookmark, created a new one. The new one works (that is, doesn't work) just like the old one. Perhaps one of the music files is corrupted. I'll delete and reload them and see if that helps.

edit No, that didn't help, but maybe I found out what the problem is. The "intermediate" bookmark, that is, the one I go to between attempts to play other bookmarks, is too large -- 542 tracks, 40-50 hours. Any time I try and call up a bookmark from within that bookmark, the Karma crashes. In other words, when it crashes it isn't the bookmark I'm attempting to load, but the one I am coming from that seems to be the problem.

tanstaafl.