No game freezing for me, I can\'t comment on the rest of your post cos I don\'t understand what you are saying..
"And as a contribution to the fps debate i only want to add that when the game freezes it\'s only one (or zero new) fps but my eyes can still see that frame..... but it is not much motion in it. The TV however delivers a constant fps (above 24) but it is the same frame all the time"
Could you rephrase that?
Personally, I don\'t see any kind of problems with the frame rate, It may slow very slightly from what looks to be about 30fps, but this only lasts for about 1/5th of a second and can hardly be blamed for bad playing (which is why most people complaint about fps).
And yes, turning of the trails makes it look less like your using a lcd monitor, with all it\'s ghosties and such. Much better without

.