L'Antre du Tryphon

Simply create a file named /etc/X11/Xsession.d/80overlayscrollbars and put into it the following line:

export LIBOVERLAY_SCROLLBAR=0

or simply execute the following command

echo "export LIBOVERLAY_SCROLLBAR=0" > /etc/X11/Xsession.d/80overlayscrollbars

You need to do the above as root.  This fix also resolve the Eclipse scroll bars issues.