Thunderbird does not follow url links in Firefox

Since the recent update from firefox2 to firefox3 the links in my mails
do no longer work. No window pops up. After some debug I found the
problem. Let's share it with others that experience the same problem:

I'm using Thunderbird 2.0.0.17 (manually downloaded, that might have
caused the problem, I have not tried with 1.5)
I'm using Firefox 3.0.2 (yum installed CentOS 4.7)

To solve I created a small wrapper script that unsets LD_LIBRARY_PATH:

cat <path>/firefox_wrap
#!/bin/bash
unset LD_LIBRARY_PATH
firefox $@


To start add :
user_pref("network.protocol-handler.app.http", "<path>/firefox_wrap");
to
~/.thunderbird/<salt>/prefs.js
(or use the advanced config editor)


The error message (for those Googling around):
/usr/lib/firefox-3.0.2/firefox-bin:
/opt/thunderbird-2.0.0.17/libnss3.so: version `NSS_3.12' not found
(requiredby /usr/lib/firefox-3.0.2/libxul.so)

Cheers,
Theo