Hi, I am running cgminer 3.1.0 with 13.4 ATI drivers.
cgminer starts up, I wait a little, and crash. Here is the log file.
http://pastebin.com/cMLkmLrgMy cards are as follows : Gigabyte6950,Sapphire5870,Ref5870,Ref5970
I read about "good drivers", I just installed drivers 12.8, and the drivers won't seem to load properly on my machine, I get "loadMM.exe failed to start" and cgminer still crashes on startup.
Before I tried this, I was running cgminer 2.11.4 as well as AMD drivers 13.1. I had the problem where if I rebooted sometimes cgminer would fail to start (but not crash). I had to boot in safe mode, uninstall all the ati cards, reboot, have Windows detect them all again, reboot, and it would work. But that's really an unstable situation to manage remotely

[edit] I have re-installed a fresh copy of Win7-x64, installed 12.8 drivers and ran cgminer 3.1.0, seems to be running fine for now.