[Bug 1016033] [NEW] firefox and thunderbird don't show dropdown menu after upgrading

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After upgrades reported below, both thunderbird and firefox present some
problems involving dropdown menu but only when they are run by the
launcher in desktop sidebar. If I run them by terminal or if I create a
new icon-launcher for both programs they don't show any problem; when I
put the brand-new launcher icon on the sidebar it opens fully functional
programs but after a reboot the bug is there again. However the
launchers that are away from sidebar opens properly working versions of
thunderbird and firefox and also terminal command does it. I noticed
same problem on two different machine running both ubuntu 11.04.

An example of type of problems that I notice is that firefox doesn't
show suggestions of the awesome bar that normally appear in a dropdown
menu.

Upgrades probably involved are:

 thunderbird-globalmenu:i386 (12.0.1+build1-0ubuntu0.11.04.1,
13.0+build1-0ubuntu0.11.04.1), thunderbird:i386
(12.0.1+build1-0ubuntu0.11.04.1, 13.0+build1-0ubuntu0.11.04.1), firefox-
globalmenu:i386 (12.0+build1-0ubuntu0.11.04.1,
13.0+build1-0ubuntu0.11.04.1), firefox:i386
(12.0+build1-0ubuntu0.11.04.1, 13.0+build1-0ubuntu0.11.04.1),
flashplugin-installer:i386 (11.2.202.235ubuntu0.11.04.1,
11.2.202.236ubuntu0.11.04.1), firefox-gnome-support:i386
(12.0+build1-0ubuntu0.11.04.1, 13.0+build1-0ubuntu0.11.04.1), firefox-
locale-en:i386 (12.0+build1-0ubuntu0.11.04.1,
13.0+build1-0ubuntu0.11.04.1), firefox-locale-it:i386
(12.0+build1-0ubuntu0.11.04.1, 13.0+build1-0ubuntu0.11.04.1), firefox-
branding:i386 (12.0+build1-0ubuntu0.11.04.1,
13.0+build1-0ubuntu0.11.04.1)

I hope to have reported all information that are necessary and to have made myself clear.
Thank you for your attention.

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
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firefox and thunderbird don't show dropdown menu after upgrading
https://bugs.launchpad.net/bugs/1016033
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