I am wondering if anyone else is having issues with the new Mac Pro's running Windows 7 with Steam and L4D2 using a 5870. When I try to search for a game using steam in Windows 7, the second I type in Alien, it gives me a Runtime Error, and crashes Steam. I am also experiencing hard lockups with L4D2. When I play Dead Center, the game loads up with Music/Voice chat, but no sound fx. Then when I walk to the first event which is the explosion down the hallway it locks up completely. A hard reboot is my only option. I have Fdisked, full reformatted, and installed windows/software over again and I have the same issue everytime. The only weird thing I can think of that might be causing this is because I am installing Steam on a HFS drive that is accessible using Mac Drive 8. If anyone else is having this issue, please let me know. Thanks!