Wow, this went much faster than I expected it to be. Also, this may be the first time I've ever seen an imageboard support BMP.
All we need now is some sort of stress test of the board, as in having more than three posters posting on the chan.
I got an error while trying out posting a JPEG picture in this post, which read and I cite, File At the baseball pitch.jpeg: Wrong extension (jpeg) for the file mime-type (image/jpeg)! This usually means that your file is faulty. — Would that be a problem with the image or the site? Through some strange coincidence, I only have one JPEG picture in my Filly folder, much less than I thought I'd have, which leaves me little to test with.