closing tab and right click on bookmarks disable some menu options

[CrounchPad]

Binary package hint: firefox-3.0

0) Execution:
    1. Close any tab with middle click (mouse wheel)
    2. Quickly right click on a bookmarked button from "Bookmarks Toolbar"

3) What should happen:
    1. To have opened the right click menu with the option "Open in new tab" available...

4) What happened instead (not normally, I suppose):
    1. The menu that appears has some items unusable (like "Open in new tab").
    2. So U have to right click again on that bookmarked page (button from "Bookmarks Toolbar") to open it in a new tab....

1) Info:
    1. I'm a user (not admin) using Ubuntu 8.04 and Firefox 3.0.6. (The account is desktop-user, I think)
    2. The Ubuntu user account is automatically loaded when the computer is started (choosed from "Session" option in Ubuntu)
    3. The "apt-cache policy packagename" command get (so I tried 4. below):
          user@ubuntu:~$ apt-cache policy packagename
          W: Unable to locate package packagename
    4. The "uname -r" command get:
          user@ubuntu:~$ uname -r
          2.6.24-23-generic
    5. The "lsb_release -rd" command get:
          user@ubuntu:~$ lsb_release -rd
          Description: Ubuntu 8.04.2
          Release: 8.04
    6. More info:
         1. That's happening while still browsing in Firefox on "Desk 2" and not choosing to restart it after installing 3 add-ons:
             1. Adblock Plus 1.0.1
             2. NoScript 1.9.0.5
             3. RefControl 0.8.11
         2. While having opened the "Library" (Organizing Bookmarks) on "Desk 3"
         3. While having opened another Firefox window on "Desk 1"...
    7. Happened and after restarting firefox and having installed the 3 add-ons.......
ProblemType: Bug
Architecture: i386
Date: Thu Feb 19 07:05:31 2009
DistroRelease: Ubuntu 8.04
Package: firefox-3.0 3.0.6+nobinonly-0ubuntu0.8.04.1
PackageArchitecture: i386
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox-3.0
Uname: Linux 2.6.24-23-generic i686