If you follow the instructions in this forum post you'll be able to downgrade your kernel version back to .22 until .24 shows up on your local mirror.
http://ubuntuforums.org/showthread.php?t=306424 -- MASTER: Computer will not boot after 2.6.20-14.24 kernel upgrade https://bugs.launchpad.net/bugs/106063 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
