Fanart displaying improperly/distorted

[burgertime]

This is something I noticed the other night. I went through and deleted all files in all directories besides the video files. So, I Deleted all fanart.jpg, folder.jpg, show.nfo, etc....
After that I cleaned the library and rescanned everything. After this, I see some shows seemed to have some built in fanart. For a couple shows, the images are corrupted and I'm not sure why.
These display with multicolor lines through them. Some shows seem to have also found their own fanart and they display correctly. How and where is XBMC getting this fanart from if I deleted all the files and cleaned the library?
here's some pics.