Sprite Artifacts

Hey guys.

Just stretching out a sprite to make walls, an exercise that has worked perfectly previously. There seems to be strange artifacts that show up in the editor and in runtime which I can't figure out the origin of. I've checked, every pixel of the sprite is black, and yet:

<img src="http://dl.dropbox.com/u/1378330/question1.png">

Anyone know how to fix this?

The only thing that comes to my mind is zooming. Depending on the hardware you may experience some "misaligning" when the zoom isn't exactly 100%.

But this is a wild guess.

This happens at the right edge of textures for reasons I don't understand.

Solution: use a panel or box instead.

On the Runtime Properties, try changing 'Sampling' to 'Point'