Not the biggest bug out there, but things annoy me. Select any number of tiles (could be 10 tiles, could be 15, could be just 1) press C to copy it, and then press M to move it... to the same position. The tile will be deleted.
Um. Moving bug.
ack, just tried that, its true. It deletes the tile.
It has to do with the copy bug. When copying tiles, they should be copied to a buffer first before they are pasted or moved at all.