It would be unrelated to vBulletin update, worry not about that
I believe I may have fixed it, over the next couple of days I reckon I'll get around to posting an update - I'm busy with my newest project atm.
In the meantime, and to summarise for whoever else might be dropping in:
Creating a new Category and assigning your Moods to that category (or importing the supplied status-export.xml file) will fix this issue.
Fillip