[DustyPorViva]

Ya, that's all I use are shortcuts. So ya, that's probably your problem.
Graal doesn't use the actual OS clipboard for copying/pasting tiles. It uses a built in system. IE, you can't copy tiles from one instance of a level editor and paste it into another instance(you can copy text from wordpad, then copy tiles from the editor and you won't lose your copied text). It's all done within the level editor itself... so that may be the problem.

I would propose that Stefan copy the tiles to the OS clipboard in the same format as they're saved for tiles(copy tiles, and then paste it in wordpad for example, and it would look like tiles do when you open an nw in wordpad) instead of using a built-in system, but you know that'll never happen.