Hm. I can imagine keyboard navigation getting messed up... but I don't use keyboard navigation, and (using mouse) I have zero problems with form elements.

If other people are reporting these problems, then probably they're well known. Have you searched? Is the consensus that they're browser bugs? What browsers do you use? I'm using Chrome. No problems. Never had any problems in Mozilla products either. Maybe I'm not grokking the failure scenario. What steps can I take to trigger the phenomenon?