Yeah, I thought my whammy bar was acting funny, but I'm not a professional guitar player, so maybe my whammy bar was doing how it was supposed to. Then word came out that the whammy bar of some guitars weren't working right...and wouldn't you know it I was one of them. I was waiting for an answer like this to come around, but now it seems like though it may fix your whammy issue it may completely crash and brick your 360. Ouch! So much for product testing.

From the article:

According to the official Guitar Hero II forums, Red Octane, tired of people weeping, and wringing their hands with grief over the spotty performance of their shiny, new whammy bars, has released a patch for Guitar Hero II via Xbox LIVE that should alleviate the issue.

The humor only begins there, though, as reading the thread where they announced the patch reveals that 90% of all replies were from people who installed the patch and subsequently had their 360s (metaphorically) catch fire, run around the room screaming, and collapse in utter agony. The symptoms seem pretty similar in all cases, with people having downloaded the patch and experiencing frequent lock-ups soon after. Compounding that thread o' bad news, is this thread over on the official Xbox forum filled to bursting with people whose 360s seem to have murdered themselves upon contact with the patch.

Read the full article over at destructoid.com