Random network interface names in FC6

[Mika Penttilä <mika.penttila@xxxxxxxxxxx>]

After upgrading my x86_64 box from fc5 to fc6 my former eth1 interface 
is renamed like __tmp182434234, and it changes with every boot. This is 
a forcedeth ethernet card. My eth0 is working as expected.

I'm not doing any device renaming myself, but tried putting it in 
/etc/mactab for workaround but didn't help. Any ideas what might be 
going on?

Thanks,
Mika