#1) ALWAYS use batteries. Hard to fuck 'em up that way. They also sound better than adaptors.
#2) Go to your local dollar store for 9 volt batteries. You can get Panasonic non-alkaline (which sound better yet) for a buck apiece. You can get some really shitty sunbeam ones for 2 for a buck.
Nah mate I live in London, my sis used to live in Guildford, not anymore though. I've decided i'm getting the OD808 next week.. the Maxon still stinks of burning plastic!
It's probably the opamp. That's what fried when I did it, and that's what I usually hear about happening when people accidentally use a Line 6 adapter.