Here is a dmesg from the machine. As you can see from the last 5-6 lines the network cable is unplugged to get it too boot, and then plugged back in where it functions again. This may be coincidence.
** Attachment added: "dmesg from errant server" http://librarian.launchpad.net/4424402/dmesg.txt -- Ubuntu Server 6.06.1 Crashes on Boot Configuring Network Interfaces https://launchpad.net/bugs/62280 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs