EA replacing defective Rock Band guitars
Do you find yourself in the unenviable position of having one a' them broken gee-tars for that Rock Band game? Believe it or not, you're actually lucky, because Electronic Arts is now replacing (or repairing) said guitars for free through a customer support page. We should probably note that Joystiq hasn't managed to get the replacement site to work yet, so be patient. Harmonix has admitted that there was a strum bar "imperfection" in an early production run of guitars, which has since been rectified for future runs. Of course, you could always try to fix it yourself, not that we're recommending that. If anyone out there manages to get a guitar replaced, let us know how smoothly the process went.
Read -- Rock Band support
Read -- Harmonix on guitar problems