Music from my library cuts out and other times, jumps to next track. As many others have reported, this has never happened... only after I upgraded to 4.1. And no, it has nothing to do with my wi-fi connection (or my computer's connection to/signal from my wi-fi router to/from my controllers. It happens even when I have full signal and full functionality/connection from my controller (Macbook Pro or iPhone) for all other uses (surfing the Internet, sending/receiving email, etc.) and no glitches or downtime occurring with any of the other 10 Internet connected devices in my house. Also, yes (even in the face of my wi-fi router obviously functioning fully), I still took the time to pull the power on it for >30 secs... on several occasions, and to no affect.