Okay. I recorded 2 videos, both very short. They demonstrate the normal behavior in version 9 and the “not so normal” behavior in version 10.
As I stated in the original message, it seems that in version 10 the hint location is all over the place and not close to the mouse cursor.
And when you click on the “Save” button the hint appears again. Very odd. I got this to occur on your demo, too.
By the way, I tried this on “Ubuntu” and “Aluminum”. Both behaved the same way. So I assume that all skins exhibit this.
Hope this helps.