I'm using 16x16 sprites, and when I jump I usually land 1 pixel away from the floor:
<img src="http://i.imgur.com/lgZcW.png" border="0" />
I thought I fixed this... but I'll take another look for the next build.
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I second this. Had to change the collision rectangle to make it precise, otherwise it would almost always land 1 pixel above the solids.
Looking forward to the next build, thanks Ashley!