I fired up New Vegas this afternoon, nothing new. However, upon loading a save, I found that I could no longer crouch/sneak, draw my weapon via either holding reload or pressing the fire button, and right clicking would no longer zoom. The mouse buttons still function in the menus and Pip-Boy, however. I have the latest patch as of today, 5/14/11, and have Dead Money installed. This bug affects all my saves, as well as newly created games. I've tried restarting the game as well as my machine, as well as attempted to reconfigure my controls- no luck. Any advice, or has anyone had similar problems?

Can you remap those functions to different keys/buttons and get them to work that way, and do other functions work on those keys/buttons? I had a some what similar problem in Oblivion where the 'c' key stopped working, no action mapped to it would work, but it worked fine in the console.

I've tried remapping in both ways, but it's the functions themselves that won't work (crouching, drawing weapons, zooming).