iceweasel / firefox segfault after lenny upgrade

As just said in a previous post, I am using lenny and lately upgraded
it. Firefox/Iceweasel fails to start since then:

towncat@murandy:~$ firefox
/usr/lib/iceweasel/firefox-bin: Symbol `SSL_ImplementedCiphers' has
different size in shared object, consider re-linking

(gecko:14849): Pango-WARNING **: failed to create cairo scaled font,
expect ugly output. the offending font is 'DejaVu Serif 12.798828125'
Segmentation fault
towncat@murandy:~$


--
To UNSUBSCRIBE, email to debian-user-REQUEST@xxxxxxxxxxxxxxxx
with a subject of "unsubscribe". Trouble? Contact listmaster@xxxxxxxxxxxxxxxx