I have an American Standard strat, and I last changed all the strings 3 months ago. As of the last 2 weeks, I've noticed that my G string gets out of tune when I bend it: it goes roughly a quarter tone flat. When I use the vibrato bar I hear a faint clicking noise and then the string goes back into tune.
Now it's starting to happen with the B string too.
I tried completely releasing the tension on the strings and bringing it back in tune again, but the problem persists. Next thing I will try is to restring my guitar and see if it fixes it.
Is that something you've seen before? Does it have an easy fix?