I decided to switch my desktop computer to Ubuntu, but every desktop I have tried has had completely messed up backgrounds. On Budgie, I could temporarily fix it by changing the background, but not on Elementary OS. I have had issues similar to this on another computer, and removing the graphics card fixed it. Unfortunately, that is not an option here. I am using a Nvidia GeForce 7300 LE, if that helps. Here are some various examples.