[c-nsp] My sham-links disappeared?

[Code Monkey]

On 8/31/07, Code Monkey <have.an.email at gmail.com> wrote:
> I just upgraded a 7206 NPE 300 router running IOS (C7200-JK9S-M),
> Version 12.2(15)T17 to an NPE G1 running (C7200-JK9S-M), Version
> 12.4(16).
...
> I was sure the new one had all that the old one had, I had tested it,
> and almost everything is perfect -- except that the OSPF sham-links
> with the other routers won't establish themseves. I hadn't checked
> *that*, of course.
...
> Is there a compatibility issue between the IOSes? What can I do?
> Thanks for any help.

I panic-downgraded to the old IOS on the new hardware and everything
came up smooth as you please. Any ideas? Known bug?