I heard 1.6 is better, I'll try it out right away. What about the options? For mario tennis I use super2xsal, force alpha blending and force z compare.
Edit: the replays are better under the settings I mentioned for Direct3D 1.6. I found however that play is alot better under 1.5.2 with Force normal blending, force depth enable and force depth compare. I also had framerate issues with 1.6. Does anybody know a better setting?