I don't know which server it is, since that's not displayed anywhere I can get to, but it is easily reproduceable. It does affect LochJournal 1.1 in that the client ends up sending a blank line as the mood and so LiveJournal happily displays the empty current mood.
While not a high priority, this has been around for a few weeks now and has been rather troublesome. I didn't post this to Zilla because it's not a bug, per se...just more of an out of date cache or something.