I have been working on this problem for a while now. I am trying to add JPEG support to a program with libjpeg. For the most part, it is working fairly well, But for some JPEGs, they show up like the picture on the left. It may not be obvious, but the background shows up with alternating red green and blue rows. If anyone has seen this behavior before and knows a probable cause, I would appreciate any input. I have padded the rows to be multiples of four bytes, and it only slightly helped the issue.