I started playing borderlands again today and the grenade button stopped working suddenly. Tried every controller I have and the same effect. It was mapped to the r shoulder buttton (default setup) so I changed it to the b button it still no grenades. I know it's not the controllers 4 controllers can't all be defective. It's something else and I have no idea what it might be. This also happened to me on a rental of Bulletstorm the r shoulder button stopped working and I couldn't leash any thing and was stuck about 1/3 the way in the game. Has anyone seen anything like this?