wakewatcher - 2007-04-19

I like MPC for a lot of reasons one of which is its ability to single step foward and backward through clips. (I use it for American Football coaching video playback.)  However it doesn't seem to single step backward when playing through (for lack of a better term) avs file with the arrow key.  I can drag the slider back single step and can use the arrow key to go forward single step but not backward. Is there a reason for this?  Thanks.