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Binary package hint: firefox

There is an annoying bug with Firefox in Ubuntu 11.04 with the Unity
desktop: frequently when I try to access context menus (either right-
click menus or the URL drop-down) they disappear as soon as I move the
mouse.  It also often takes several clicks to get the menu to come up at
all.  For example, to open a link in a new tab, I right click on the
link, and would normally then click on 'Open Link in New Tab' but
cannot, as the menu disappears.  Instead, I have to right-click and then
type 'T'.

The bug is reproducible on my machine.  It occurs whenever I have Firefox running in one workspace, and have switched to another workspace (perhaps to check email in Thunderbird), if I use the keyboard to move back to Firefox's workspace (i.e. using Ctrl+Alt+arrow keys).  Usually Firefox is the only open window in its workspace.
On the other hand, if I use the Unity Launcher to return to firefox, the bug never occurs.  (And I can resolve the issue if I navigate away from Firefox to another workspace, and then return by clicking on Firefox in the launcher.)  While this does provide a workaround, it's not ideal for two reasons:
1. When the bug does occur, it's very frustrating to have the menu disappear on me.
2. Keyboard navigation is practically instant, whereas launcher-based switching takes more time - I have to switch to the mouse, then unhide the Launcher, and then click on the firefox icon.

Somehow if I use the keyboard to switch to Firefox's workspace, the
window is not getting the right mouse focus - although left-click and
scrolling seem to work fine.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: firefox 4.0.1+build1+nobinonly-0ubuntu0.11.04.3
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Mon Jun 13 18:01:14 2011
FirefoxPackages:
 firefox 4.0.1+build1+nobinonly-0ubuntu0.11.04.3
 flashplugin-installer N/A
 adobe-flashplugin N/A
 icedtea-plugin 1.1~20110420-0ubuntu1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug natty running-unity
-- 
Context menus don't work properly after keyboard-based workspace navigation in Unity
https://bugs.launchpad.net/bugs/796897
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