After downloading and completing Hours of Darkness I found 3 weapons that will disappear from my inventory and store in the main game. The unique skinned .44 Mag, D2 Outlaw, and the Big Game Hunter compound bow. Other than a couple hiccups here and there I've never had any issues with the game and I know it's not a game killer since these are just skins but I don't want to have to reload the game and not fast travel to keep a weapon.