Was just mucking about in goodsprings when all of a sudden my PS3 goes straight to the XMB menu :S I didn't quit the game myself or anything. This has never happened to me on any other game.
Has this happened to any of you guys on any other game before?

This has been reported here before. Very annoying bug!

This is not a game specific bug, I have hjad this happen while playing Demon's Souls as well as Warhawk, Final Fantasy XIII, Fallout 3 and a few other games. It is something to do with the PS3 firmware or something of that nature I am guessing.