[Loriel]

I dare unclose this restricting the topic to posts relevant to getting rid of the hax0red graphics. Note however that it is considered bad form to bring up two unrelated topics in one thread.
I assume you would have installed Graal over your existing install. Of course it will not overwrite existing files with a newer date. So you either have to install Graal into a new directory, or go through levels/webgifs and levels/images, sort by date and find the corrupted graphics, and delete them.
If neither of that helps, the servers you play on must have the evil graphics on them.