I've yet to test Vsyncs effects, but I wanted to report that the odd tearing effect happens on choco or on foot for me. Also changing to 30FPS should have no noticeable impact on your game. The human eye can't even process more then 30fps, so you cant tell any difference. Also I've been running on 30FPS cap sense they released that option, so i know setting it to that doesn't fix this problem.