(In reply to comment #65)
> (In reply to comment #62)
> > I say this is a UI bug. All OS X apps that have a top menu have that border.
> > LO Does not so it's either ignorant to OS X specific standard design or it
> > is a valid bug.
> It's not OS X-specific. It's the case with Gnome's Adwaita theme as well.
This bug can be also reproduced under Windows 7... but only wearing a Firefox
Persona and not the default W7 look. Maybe this bug was introduced when the
"new look" for W7, which imitates the uniform gradient between 2 toolbars
without any separation.