I am from Australia using recetly purchased Version 11. Viewing my production in preview is difficult as it is very jumpy. Preview is set at Preview (Auto).
Video Properties are set at TEMPLATE: HD 1080-60i (1920x1080, 29.97fps) WIDTH: 1920 HEIGHT: 1080 FIELD ORDER: Upper Field First
PIXEL ASPECT RATIO: 1.0000 (square) FRAME RATE: 29.970 (NTSC)
The problem is mainly with video where it jumps 30, 40 or 50 frames at a time. Also with transitions. Even using the arrow keys it is 3 frames for each keystroke. Makes it difficult when doing some fine tuning.