Steve Harman points out another bug in the upgrade process. I feel really terrible that this one slipped through, though as far as I can tell so far, it may be mostly cosmetic in its effect. It apparently converts some comments to trackbacks. While this is not desirable behavior, since we show both comments and trackbacks in the comment section, it might not have a huge negative effect.
Unfortunately, I am in San Jose right now, so I can’t update the release with a fix yet. Hopefully Steve can handle it.