I picked up one of these when I was putting my build together, and I'm plenty happy with it - big, chunky feel fits well with my gamestyle. Problem is, the 6th button - lower thumb button - doesn't seem to work. It never registers when I try and program in keys for games, specifically the input-activated binding (a la most games, rather than drop-down box assigns like Overlord and limited other games with a config splash). Anyone else have this problem? Is there a trick I'm missing, or did I get a dud mouse shipped? Every other button press works fine, apart from the hat switch, for which I get the same issues.