I'm having trouble with the World of Minecraft client (v 1.6.1c for linux). Whenever i press either mouse key, it registers, but also registers the escape key right after, opening the menu (i did not press escape). I'll try the client on Windows later to see if it may be just this specific client version, and if need be, I'll install it onto an identical computer (except software), to see if it the hardware. If anyone can help, or if anyone else has the same problem, please reply.