Thunderbird missing top menus

[Leszek Lesner]

Am Mittwoch, 28. November 2012, 13:18:12 schrieb Lars Noodén:
> On 11/28/2012 01:07 PM, Leszek Lesner wrote:
> > Am Mittwoch, 28. November 2012, 12:19:23 schrieb Lars Noodén:
> >> On 11/28/12, John Hupp <lubuntu at prpcompany.com> wrote:
> >>> press Alt-F to see if the File menu appears.
> >> 
> >> I hadn't thought to try that, it does show the menus.  Very strange.
> >> They all disappear again when anything is pressed.  This makes
> >> Thunderbird usable but very awkward in that the keyboard must be used
> >> not just the mouse alone.
> > 
> > Perhaps thunderbird ships with a unity global menu plugin that keeps
> > activating itself.
> > Try to take a look in the addons manager and disable anything that stated
> > to be a global menu integration or unity integration.
> 
> There were two add-ons that seemed related to Unity, but turning them
> off and restarting Thunderbird did nothing to affect the menus.
> 
> Regards,
> /Lars

As I had some time now to check on it again here a possible solution: 

Seems to be a new "feature" to integrate menu in titlebar which can be 
disabled by disabling "mail.tabs.drawInTitlebar" from Preferences -> Advanced 
-> Gernal -> Config Editor