To those of you who want to upgrade their iTunes 11.1, Beware, they have problems with podcast.
I have 2 itunes in 2 different mbp (mbp1 - mine, mbp2 - wife) signed in under my account (for app download purposes). We listened to different podcast. For some of the same podcast we subscribed, I'm way ahead than my wife's. Thus my wife's mbp has lots of old podcast. Once I've upgraded both to iTunes 11.1, the podcast on both itunes were sync, resulting to subscribing the same podcast and hers losing all her old podcast. ... APPLE, I've tried to find in her trash can, none, I also tried to find in her itunes media folder, gone. This is sucks. I don't setup time machine on hers.