I have a round corner div. It's your standard three part image. Top, middle with repeat-y, and bottom. On my iPhone (and iPad I'm sure) with every different zoom level comes a different rounding error with those background images. The rounding error is left to right. It's not even a full pixel - more like a half. The only thing that I found that lessons the behavior is to float the outer div. But it's only lessoned - not remedied. All three images are the same width so it "should" not happen. Googling I see that this is a common annoyance without any obvious fix. Has anyone found any fix for this yet?