Ive had no such problems. Working great
Only thing that happened to me was i had Live Messenger running and opened up Youtube app and it ran out of mem almost. but thats pushing it anyway lol.
I also had a music tab issue. i would press play on a song and it wouldnt do anything, continued messing around with the phone and about 2 minutes later the song randomly started playing while i wasnt even on the music tab anymore.