Ever since the 2.0 betas have come out, I have watched for bugs to be able to help out in getting the 2.0 final release as stable as possible.
So, this morning, I start my car, and listen to a song from Chrono Cross start playing. And I sat there trying to figure out why that was playing instead of Personal Jesus from Depeche Mode. I saved the playlist as bookmark 2, restored bookmark 1 and skipped ahead. Personal Jesus was still there where it was (about 5 songs ahead of bookmark 1, I use #1 for my entire player shuffle and restore to it after listening to something specific). Finally, some of the songs after Personal Jesus made me remember that I had made a midnight run to Wendy's for a quick bite to eat before going to bed.
It took me a few minutes though, because I have been trying to remember the last played song for possible bugs like this, and had just happened to remember the time before last.