Here's a weird one. New HP CP5225 color printer, everything's OK except when you have a Duplex job with an odd number of pages - the last page prints on the wrong (back) side...
Can't just flip the last page over - using pre-punched.
Changed driver, updated firmware, tried XP, Windows 7, Server 2008 R2 - makes no difference. Using as a shared printer on a 2008 R2 server.
Anybody else seen this? Maybe yours is doing it and you haven't noticed?