While it's not actually part of the earlier bug, did find another. ValhallaDecorator will never suggest perm-ing skill 1004 even though it's now available again. This is in listPermanentSkills.
If you tested before 12852, mafia didn't know you had the skill because it didn't recognize the name.
Edit: Or Darzil fixed it in 12850 before I got a chance to look at the code.