I have a 8800 GT 512mb at home, never had blooming issues before.
I believe my graphics are set to Medium (which has blooming effect: ON).
Could you say what other graphics are set on/off?
I'm going home friday-evening, then i'm gonna experiment with the graphics; see if i get a messed up blooming effect.
Also make sure u have to latest drivers:
http://www.nvidia.com/Download/index.aspx?lang=en-usHow to:
1/ click on the link
2/ give in the correct data
3/ download
4/ delete current drivers (install/remove programs)
5/ now u will be asked to reboot; click yes
6/ upon restart, shitty graphics :p
7/ install new drivers
8/ reboot
9/ done (adjust resolution or refresh rate if necessary)