Same problem here:
Windows 7 Home Premium 64-bit
Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz (8 CPUs)3.4GHz
8192MB RAM
AMD Radeon HD 6900 Series
Same problem here:
Windows 7 Home Premium 64-bit
Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz (8 CPUs)3.4GHz
8192MB RAM
AMD Radeon HD 6900 Series