Is there a large difference between Blender 2.73 and Blender 2.77a (current) in terms of tracking performance? I am on the second video and truly struggling with the tracks. This is especially pronounced in the perspective keys on the floor where the box shifts abruptly. Even simple location keys on objects fail every couple frames, or are very jittery. The search area is appropriate. I have tried many different key settings to try and clear this up, but I am finding that I need to manually track frame by frame by hand.
