i have a fedora 9 x86_64 and i dunno why but i installed it on one network and moved it to another, the only difference was the nameserver but every time i do a /etc/init.d/network restart or reboot, the /etc/resolv.conf reverts to the original network and sometimes when i reboot the interface doesn't fully initialize, sometimes only the ipv6 addr comes up and not the ipv4 even though on install i THOUGHT i turned off ipv6
on a non network related side note, some of the menu fonts in window maker seem to be garbled (the right click menu)

For your first problem of /etc/resolv.conf getting re-written, check "/etc/sysconfig/networking/profiles/default/" directory. I too faced similar problems and found that on reboot, the files are getting over written from there. Make your changes in the files of that directory.

Note: If I remember correctly, there was some service (NetworkManager?) which was causing this and you can turn it off. But I am really not sure about this.

For the second issue, I doubt it is related to dhcp. If you have dhcp turned on, then it is possible that you may not get a timely reply for your dhcp queries and your network may not be fully initialized. The other issue that I can think of is that someone else (on the same network) is using your ip address which prevents the system from bringing up the interface completely. For your third problem, check the "IPV6INIT" variable in the config files. Set it to "no".

I think I'm having the same issues, eth0 dosent initialize at all what do you think it might be sorry dumb question but im a total noobie

hehe in despiration i uninstalled NetworkManager hopping that would work (since i dont have a GUI didnt think i would need it)