I hit this same problem when I updated my DNS-323 (via apt-get dist-upgrade, a day or two after Wheezy went stable). Serial cable confirms the problem.
I plan to try the sid kernel, once I can figure out how (here's hoping the netinst kernel/initrd can boot a rescue image). Before I waste my time, though, has anyone tried this and found it to not fix the problem? Thanks, - Michael -- Michael Ekstrand — http://elehack.net -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org