hehe, thanks chaps
WH yes I did take the sun back to what it was before the sunhalo "fix".
On some machines, including mine, the sunhalo fix actually resulted in what you might call a Ubersun. For other people it didn't fix it at all.
I was maintaining two versions of the mod, one for my use with the original OLCUv1 sun, and one for release with the sunhalo fix, and it became too much of a version-control hassle, I'm afraid, especially given that some people were still getting a flat sun even with the fix, and other people were seeing (and posting screenshots of) an Ubersun and saying "this is OLCE2"
On my graphics card, using OLCUv2.2, 2XAA gets a flat sun but 4XAA (or higher) gets a nice sun. Maybe you could try upping your AA? :hmm:
Edit: damn, I should put this in the changelog, sorry!