Names/icons don't repaint after being obscured

[AM909]

Sometime in the last few versions (maybe since 3194), I noticed that the names/refs that render beside an icon for a POI do not always appear, or catch my eye as they are being painted unexpectedly.

I believe the symptom is that, if the name gets obscured (e.g. by another window moving on top of it), but the icon does not, it does not repaint the name when it should again be visible (i.e. when the obscuring window moves away).
...
Playing with it some more, I see that if you obscure only part of the icon and/or name and then un-obscure it, it does not repaint either - this seems to be the core issue.

Note I also updated java from 1.6.0_17 to 1.6.0_20 during this time frame, so that could be related, too.