I cannot figure out why the thing's clicking and it only happens on and off, not constantly - it sounds like the fan blades themselves are catching on something rather than the bearing having issues... anyway, is this valid grounds for an RMA? It's not an issue at all (temps are not affected) right now, and is just an audible annoyance. My only worry is that if the fan *is* catching on something, it may potentially snap a fin at some point and jam up the whole fan while in use, or worse, send the fin flying lord knows where in my case.