Random Rollback..

it wasn't a full rollback, it seems some things were saved and most were not. A friend lost an apq ticket (i.e. couldn't make it again after the crash) and someone else kept their new hairdo even though they were back at a place they'd been before changing the hair. I guess some things are commited directly to the database when they happen and some others are not

I think that's happening all the time when there are unscheduled rollbacks. For example, being lucky with a rollback could result in duplicating items. Being unlucky, you could lose it completely. It's really individual and depends on many variables, but it happens every now and then.