[Interest] No scrollbars in QTableWidget under Ubuntu Unity

[Lucas.Betschart at crypto.ch]

>just a shot in the dark:
>do the scrollbars appear when you hover the mouse near to the assumed position, e.g. at the bottom of your right view in your screenshot?
>thus, are the scrollbars auto-hiding?

No, they're not.
I'm usign default Ubuntu Theme. I've tried anyway.
Also scrolling with the mouse wheel inside the Widget doesn't work.