I've also noticed some performance issues. It's not the visual lag that bothers me really. I also came to notice that I get small, sporadic *hickups* like CPU cant handle do load, while playing music. This happens when I surf the net more intensively or just click around, but nothing too intense that a 4 core cpu wouldn't handle. This happens with all kinds of formats - Spotify, stream from local network from Xbmc (music), local (SD-storage) playback of mp3s and flacs on various media players. It's quite of sporadic nature, it doesn't happen a lot, but it's there. So this would be kind of 'audio' lag. I'm connected through pair of 3.5mm phones. The pop sounds I get to hear kind of remind of the bug on Samsung Galaxy S3 when it was initially released, although that one occured under different circumstances (when the screen was off). Anyone else has this issue? I've just downgraded my N7 from 4.2.2 to 4.1.2 and will be doing some testing to see if the sound bugs are gone now. To me this is one of the fundamental functions - stable music playback. I'm considering to return my device...