Since migrating my application from JDK 7 / JavaFX 2.2 to JDK 8u5 and later 8u20-b19 I have encountered the following rendering bug which never existed in JDK 7 / JavaFX 2.2. The code I'm using is this:

toolTips = new Tooltip();
toolTips.setFont(new Font("Tahoma", 11));
toolTips.setText((String)tip);
buttonObj.setTooltip(toolTips);

I would like to attach a small image demonstrating the effect I see on my screen. But their does not appear to be anywhere where I can attach this?

I have not logged this previously as I thought a previous CSS bug which was fixed in 8u6 & 8u20 would solve this. But apparently not!