Ah, yeah I had the same issue a while ago, but upgraded my graphics card to a 6970 from a crappy internal card, turned Oblivion to full, like you've said there, and it was utterly fine o.0 weird issue but I'm not complaining! 
Back to blowing people up with fireballs for me
Back to blowing people up with fireballs for me
My Computer
- OS
- Windows 7 x64 Home Premium
- CPU
- Intel Core 2 Quad Q9550
- Motherboard
- Asus P5N-D
- Memory
- 4GB DDR2 RAM
- Graphics Card(s)
- NVIDIA 8500 GT
- Sound Card
- Built-In
- Monitor(s) Displays
- Stock Dell 1680x1050
- Hard Drives
- 465 GB HDD
- PSU
- 750W Corsair