Comment 112 for bug 734908

BTW, I noticed the top bar only appears when there's another app open on the main screen, otherwise it's properly hidden on the second one.

Actually, It seems there are all kinds of issues with dual-screen. For instance : the height of windows opened on the main screen corresponds to the max height of the secondary one ; an app like VLC will remember on what screen it was started last, instead of opening on the current screen etc...