bookmarks in bookmarks toolbar aren't shown after upgrade

Binary package hint: firefox-3.0

After upgrading from Gutsy to Hardy Beta, my Firefox doesn't show the bookmarks in the bookmarks toolbar anymore.
If I list all the bookmarks (Bookmarks / Show All Bookmarks), however, I can see the missing bookmarks in the folder "Favoritos / Barra dos Favoritos".

This may be a localization problem (before the upgrade I was using Firefox in pt-BR, but after that it is in english).

ProblemType: Bug
Architecture: i386
Date: Fri Mar 21 13:12:27 2008
DistroRelease: Ubuntu 8.04
Package: firefox 3.0~b4+nobinonly-0ubuntu1
PackageArchitecture: all
ProcEnviron:
 PATH=/home/username/bin:/home/username/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox-3.0
Uname: Linux 2.6.24-12-generic i686