I found a movie that was a bit jerky at the 29.97fps setting so i did some testing. The movie was Daredevil and at 23.976 the movie played smooth. But, It also played smooth when converted at 25fps and 30fps. I have only played them on the computer so far and not on the Ipod, which i converted them for.
Other settings were 640 x 480, 640kbps, h264 + aac ipod 5.5G. Not a problem, just strange info to pass on. I think I will start using 30fps from now on and look for any issues with that.
Thanks all, dvdfab rocks!