Stand on top of cars while they are in motion. I haven't really had any problems with multiplayer, so no complaints.
Yeah fix the number plates, as I've noticed loads say LIBERTY CITY on them.
When you're in the water there are ladders but you can't get up them.
Achievements would be awesome I'd like them on the PS3 version.
Many thanks to The Shy Child for the sig,
XBL GT: USASoccerStar93