I have this with 2GB present. This same problem happened on dapper but got fixed. Looks like its back again.
solution for me is to remove the kernel module (as bcm43xx networking doesnt yet work for me last time I tried!) -- [bcm43xx] panic on boot https://launchpad.net/bugs/58638 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
