I've been using the Platform Behavior a lot for my next project, and I've stumbled upon another annoying bug.
Basically, if you have a platform with the same height as the sprite with the platform behavior, it will overlap it at half of its width.
The workaround for me was to increase the height over the other obstacles, but now I'm making 1 unit heihght platforms, and I managed do jump inside it... <img src="smileys/smiley19.gif" border="0" align="middle">
Already tried turning Pixel Rounding, and it didn't solve the problem.
http://dl.dropbox.com/u/7324985/platform_bug.capx