Mmmmm...
Seems I got a new one :
Pretty hard to take, though...
I was trying to improve graphics (all was set to low or off...)
So everytime I turn MSAA on, whatever the setting, it happens. It's not permanent, it is visible only when I turn the camera and look around... during the movement, I mean... And I think the center of the circle is the sun, but I'm not sure and it's pretty hard to verify it...
So here's my config :
Intel E8400 @Stock
2x HD4850 crossfired
4 Gb memory
Windows 7 64bits
Settings :
Textures High
Scenes High
Civ Traffic Low
Water Low
Visible Range Low
Heat Blur On
Shadows Low
Resolution 1680*1050
Aspect 16:10
Monitors 1 Screen
Res. Of Cockpit Displays 1024
MSAA : the point...
Clutter/Grass 300m
Full Screen
HDR
TSSAA
So what do you think ? ;)