I dont know if its the same level but my game kept slowing down on the level where you have to attack Cao Cao's castle (the one where Cao Cao sends a sneak attack to your base led by the big blue guy with a spear and funny hat). *Every so often the framrate would just slow and I would find myself dodging bullets, err..I mean arrows

. *I also have DW3 as one of my must-have games, but I am currently saving for a memory card and GTA3.