Bookmarks button not visible on toolbar

[MikeHobbs]

Binary package hint: firefox

Output of 'lsb_release -rd':
Description: Ubuntu Natty (development branch)
Release: 11.04

Output of 'apt-cache policy firefox':
firefox:
  Installed: 4.0+nobinonly-0ubuntu1
  Candidate: 4.0+nobinonly-0ubuntu1
  Version table:
 *** 4.0+nobinonly-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ natty/main amd64 Packages
        100 /var/lib/dpkg/status

Expected to see Firefox 4 bookmarks button on main toolbar. Button was not visible but could be dragged to the tab bar when customizing the firefox interface. Also, the button would disappear if added to tab bar and bookmarks toolbar was made visible.

See attached images for screenshots showcasing the disappearing button.

[Chris Coulson (chrisccoulson)]

This seems to be the intended upstream behaviour (see https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/818880/comments/6)