I have been enjoying this map pack so far, but when I get to the second map "tfv2", just after the first electrocution device, immediately when I step through the portal out of the room, Portal freezes, and I can no longer load the last loaded save file. If I attempt to load the save file after a freeze, it flashes the loading bar for an instant, then returns to the main menu. I have Portal and HL2 demo/deathmatch/lost coast installed. To clarify, this is the room after the electrocution device, following the introduction of the grids that you can portal through, but not walk through. Any help would be greatly appreciated. P.S. I am running the mappack on Fedora Linux 13 through WINE, but have had no trouble previously with Portal or other Source engine games at all.