it's an umbrella for various issues related to compound components, with an extensive evaluation which is truncated at ... solution ;-) Plus all comments - which I **bet** had been there are missing.
Known issue? Other examples? Where/how to draw attention to such a knowledge base leak?
BTW: I think this is related - at least loosely - to swing, as that particular one is a swing bug: obviously, others might be effected as well, just don't know