I have this issue with flickering tiles. When the game scrolls tiles flicker, and I don't know why.
Here's a build/sample build of the game.
dl.dropbox.com/u/32409323/Build.7z
<img src="http://dl.dropbox.com/u/32409323/Images/demtemps.png" border="0" />
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This scrolls perfectly for me (nice little megaman promo btw). Not much help, I know, but at least you know it works :)
I have the same issue. I fixed it by enabling 3d layer and clearing the depth buffer.