Forgive me for not reading 7 pages; but I think the 1.5 patch/add-on broke Anti-aliasing.
If I remember correctly, one of the previous patches allowed AA to work.
Now, it seems to be gone again. Look at this pic.
This is at 1680x1050, and it's at 6X AA, with Temporal AA turned on as well.
It should
not look like this....
X1950 pro, 8.3 drivers.
Can anyone confirm?