Does anyone have any idea why there are be few extra pixels on the
top? The black box represents the center with height equal to
heightForStringDrawing().
This caught me too a while back. The answer is it's because
NSString drawing uses the Jaguar-style typesetter behavior, I'm
guessing for backward compatibility reasons. If you switch the
layout manager to use the Jaguar "with compatibility" typesetter
behavior, then that ought to fix the problem.
