Okay, it gets stranger: my Shattered newbie has NO problems. It's only my Prime character that has this happening. Any other ideas, Tillmen? ;updater update forcemap isn't fixing it, and from my searching in the Lich folder, it worked for everyone eles getting the marshal data error. This blows.
EDIT: Fixed it. Manually deleted the 0kb map.dat file, ran updater, problem solved. Thanks for your time Tillmen.