Were you running the OC kernel before you flashed to 1.3? Did you do anything special like revert back to the non-OC'd kernel before you upgraded?
As I said, I simply can''t get the OC'd kernel to take, no matter which method I try. I was running it before I updated to 1.3 and I did the update with the power kernel installed but not OC'd, if it makes a difference.
Thanks for the link. I actually had been to the page that the above link directs to, but I neglected to do BOTH parts of the deinstall procedure (I think it's odd that it would be a two-step process, but then again, I'm not much of a hardcore programming type).
And again, it wasn't clear that I even needed to DO an uninstall, since the N900 was showing the default kernel running.
But anyway, I did finally uninstall successfully, and then reinstalled the power kernel, so I'm back to OC status. Thanks for the help.