i've found that my guitar tends to like lighter guage strings, i usualy play 50-10, but my floyd tends to return to more in tune with 46-10's, i've had the same problem, after hudge dives of big pulls, all the strings will be equaly sharp or flat but 5 or 6 cents (yes i can definitly hear it), i've tried everything, making sure the edges were sharp, no obstructions, good srpings, setting the strings up in the V style, lubbing and cleaing the contact points, it never really went away, i even replaced the bridge with a brand new real floyd rose, still the same thing, i've just learned to correct it after i do alot of trem work, after a while i've gotten used to it, it's just as subtle a movement as adjusting the volume or selecting the middle pickup in the middle of a solo.. but i hope u have better luck then me. Course i have been known to hear things that other people don't, mabey i just have really picky ears