I've gotta be honest with you, I use an ATI x800 Pro with the Omega drivers (latest) and I have never had any problems with the sun.
Did you notice this with any of the previous patch releases or are you a new GWX user?
I notice you are using the beta version of the catalyst drivers, possible problem?:hmm: Try to use final releases or revert back to older versions.
Somewhere in the MODS forum you should be able to find a mod called 'Krillers Sun', I believe this was created to correct some issues regarding the size of the sun for ATI users, this might help you. Use the search function.
Not having experienced this problem myself, I can't really offer any definitive solution, maybe others can.
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