There was a glitch in the server recently that caused intermediate interrupts in Blink File and car-wallpapers.net's uploading and picture hosting abilities.
For all you geeks, the $PATH enviroment variable was erased, so it couldn't find the ImageMagick program to generate thumbnails.
Anyway, all is fixed and good now.
Let me know if you guys have any more problems.
Edit: That means there's some wallpapers sitting in Pending right now that could use some votes: