When I called in about the trial the first thing he said was it wouldn't save the IP on reboot. I've rebooted two or three times and it always goes back to the defualt 192.168.0.220 on eth0. I've done the save settings and it didn't help.
Now, that's funny, because I also rebooted my two servers several times, and the never lost their assigned IPs. I was even able to setup bonding that would survive a reboot.
This also made sense to me, since the config is stored on a partition on the first LV you create, at least this is how it seemed to me, since I was running from a Demo CD back then and you can't of course write any config information back to it.