So, when my character's walking animation enters the second frame, it bumps upwards a little. The frames are almost the same sized, other is 2 pixels larger in x scale. Why does this happen and how can I fix it?
As you can see, in the second frame, the leg is a bit above the ground and the camera reacts to that as a bump. (And yes, that is a remake of the protagonist of Contra, fully remade and recoloured by me, and is temporary character with the exact same x and y scale :P)
<img src="http://i.imgur.com/TX71mp0.png" border="0" />
(Second frame is on the left, first one is on the right)