Too many notifications. I really don't care if one of my friends gets on the game I'm playing. I thought they had it down that nobody likes a billion notifications with the GUIDE BUTTON as a hotkey. They took that out in like 07 and I have no idea why they would ever put it back.
I just copied my ME save from an old account by going into memory, moving it to my MU and moving it back to my HDD. It now thinks the save is my new accounts. I'm not sure if that's what you were going for, but it seemed relevant.