Wikimedia Bugzilla is closed!

Works for me (Mozilla/5.0 (X11; U; Linux i686; fi-FI; rv:1.7.10) Gecko/20050811
Firefox/1.0.6).
Can you report the exact version of firefox and operating system?

Version of Firefox : Mozilla/5.0 (Windows; U; Windows NT 5.1; fr-FR; rv:1.7.10)
Gecko/20050716 Firefox/1.0.6
OS : Windows XP SP2.
Note that other people have the same bug and only on that page, all other pages
of Wikipedia work correctly. 

Works for me, Firefox 1.0.6 on Windows XP Home SP2, with a bogus printer configured 
for HP LaserJet 4M/4MP (printing to file) as Firefox wouldn't do print preview 
without a printer set up.

Try a different printer driver?

I experience the same. I just go to http://fr.wikipedia.org/wiki/Accueil or http://fr.wikipedia.org/w/index.
php?title=Accueil&printable=yes and select File -> Print Preview (or something similar, sry, don't have the 
English version around here). Then everything works fine and I can look at the pages I could print but when I 
close that preview Mozilla Firefox founds a error and shuts down. I just experience this problem on [[:fr:
Accueil]].
I also use Firefox 1.0.6 on MS Windows XP Home SP2.

Works for me:
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050730
Firefox/1.0.6 (Debian package 1.0.6-2)

Most probably an issue with firefox for windows, you might want to report it
to the mozilla developper.