The current KANJI.ROM use incorrect 8x8 size fonts too. Try to run the "WIDTH 40,25" command in BASIC to see what I mean.
Anna, could I maybe convince you to register on Imgur (http://www.imgur.com/) for any future uploads?
The image uploader that you're using embeds links to their own website in the UBBthreads code that it generates. I find that very scummy and distasteful for an image host to do.
Imgur, by contrast, allows you to easily upload images simply by dragging them into your browser window, or even copy/pasting images into the browser window, and it allows you to directly hotlink to images, thus avoiding this sort of situation.
There's typically no good reason not to use Imgur, and I'm trying to get as many people as possible to switch to it, so that we can all move forward into an Internet future without image hosts that try to take advantage of the people who want or need to upload images.