When I press the Music & Video tile it looks like it is going to load but then bounces back to the main menu.
Does on the complete list menu as well.
Did this once before for a while then started working agin.
Also now the xBox Live games is doing the same thing .
The Nokia Music tile works OK though.
When it first happened I thought it was a low battery thing as the battery was lowish, but this time the battery is fully charged.
Having the same problem. Happened just after I added Zune to my phone. Same thing with Marketplace. Bounces back to main menu w/out loading.