https://bugzilla.redhat.com/show_bug.cgi?id=1294697
--- Comment #18 from Roland Grunberg rgrunber@redhat.com ---
There were also a number of other rendering issues in eclipse-cdt which remained or actually became worse. For example, hover over a global variable name and the top half of the display box which opened up would brifely flash the variable name and value, and then turn solid black.
I was about to report that when a new set of openjdk rpms became available in updates. It seemed prudent to update and confirm the bugs before reporting, and--happy surprise!--they were all fixed!
By openjdk rpms, you mean java-1.8.0-openjdk ? I'm not sure how changes to those rpms would have any impact on Eclipse tooltip rendering so that's a little concerning. If the strange tooltip behaviour is reproduced again, I'd file a separate bug for it.