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→Tuning Issues
Many claim one of the flaws of a floating bridge is that your double-stops are out-of-tune. This means that if you are bending on one string but not another, the bend increases overall string tension on the bridge, causing it to pull-up a little, which causes the unbent string to fall a little flat. There are two simple solutions: pull up on the bar a little or apply a slight bend to the flatted notes. This counteracts the raised bridge and keeps the unbent note in tune.
There are ''devices'' that claim they can help keep your tremelo bridge in tune even with whammy use. They use a double-springed hinge similar to a bar mini-door that can open in either direction. These work to various degrees, but they all tend to diminish the desirable qualities of the floating bridge by preventing a smooth transition between pitching downwards vs. upwards. They particularly hurt flutters, but also affect vibrato. I recommend ''not'' using these.
Ultimately, your tuning stability is a byproduct of the quality of your guitar's parts and setup. The big things to look at are the bridge's ''knife edges'' and your ''bridge posts''. If either of these are heavily worn, they will not settle to "neutral" consistently. Also the knife edges should be perfectly perpendicular to the posts in neutral position. If the bridge is angled differently, you will need to adjust the tension of the bear claw springs accordingly.