Anti-Aliasing not working (sometimes)

[Zenoth]

For some reasons, Anti-Aliasing and/or Adaptive A-A does work in some of my games like Elder Scrolls IV: Oblivion, Half-Life 2 (or any Source games) and Unreal Tournament 2004.

But, it never works all the time.

For example, sometimes I start UT 2004 with A-A enabled, and when the game starts it ain't applied (an easy way to see if it's working is to look at the Nvidia's The Way It's Meant To Be Played logo, since it's a round symbol, it's easy to notice the edges being blurred by A-A or not). To make it work, I usually have to close ATT, start it again, and then disable and re-enable it several times in a row, until it finally works.

Technically though, all my Source games always work with A-A. However I set A-A as well as A-F via the in-game options, while ATT's A-A and A-F are both set at "Application Controlled".

Now, a game like Battlefield 2 never works with A-A, neither via ATT nor even the in-game options. It just plain never worked with A-A, it's never applied, ever. In fact I haven't seen any A-A applied to my BF 2 since many previous ATT versions (as in 1.0.4.xxx), and I can also say since previous BF 2 versions. Another game where A-A never works is Doom 3, and just recently Prey (Demo).

Is there any bugs related to A-A and/or A-F that I am not aware of that I should know ? With ATT of course ?