RG2550 doesn't stay in tune
I just bought an Ibanez RG2550 with the Edge Pro Trem. I whammied it a good amount and it managed to stay in tune fairly well. However, I just noticed that when I bend the high strings (high E, B, and G) like a crazy madman, basically as hard as you can just to see what happens, it throws the guitar out of tune. But it throws out the Low E and Low A of all strings and badly. The guitar appears to be in really good shape, almost new (bought used), what could be the problem? Any ideas?