After upgrading Debian Wheezy to Jessie, I experience some random unhiding behaviour of the bottom panel. It does not appear - as before - by moving the mouse into lower right corner. It seems it is showing up, when you move the mouse in the middle of the bottom... but only in 1 out of 15 cases... * How is the right way to unhide (is ticking enough or does keeping the mouse there for a few seconds help ... and where)? * Are there ways to change the behaviour? Current Gnome version is 3.12