firefox update bad

[Roman Maeder <gmAD 20 rmaeder spamgourmet com>]

today there was an update to firefox, firefox-3.0.6-1.fc10.x86_64.rpm.
Now, when I try to run it, it just exits without any message.

How can I get back a working firefox? The mirrors no longer carry the older 
version. I tried to install the original version, 
firefox-3.0.4-1.fc10.x86_64.rpm
but it would list a ton of i386 (not x86_64) packages as dependencies.
No good.