Why do images for textures on the iPhone need to have power-of-two dimensions?

Question

I\'m trying to solve this flickering problem on the iphone (open gl es game). I have a few images that don\'t have pow-of-2 dimensions. I\'m going to replace them with images

Answer 1

I imagine it's a pretty decent optimization in the graphics hardware to assume power-of-2 textures. I bought a new laptop, with latest laptop graphics hardware, and if textures aren't power-of-2 in Maya, the rendering is all messed up.