Screensaver picture pixelation

I point my screensaver to my pictures folder. Since installing Snow Leopard many pictures show up with pixelation. After some research it sounds like it's displaying the thumbnails from iphoto when these show up.
I didn't have this issue prior to upgrading. I have another Mac (mini) that uses the same set of files and it doesn't display pixelated.
Any ideas on how to get around this?

i haven't played with front row much at all, i will look into it thanks. is there a way to set this as the automatic screensaver? I already have the photo album set up as this.....just sometimes would be nice to review a picture before is disappears or after if you know what i mean.

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