Just to follow up on this problem: I was able to solve it and I see that others have also come up with the same solution (
https://groups.google.com/forum/?pli=1#!topic/google-appengine/_ERKSOmCOyQ).
What I did first was to try to re-upload the certificate. However it wasn't letting me saying "you must first verify the ownership of the domain(s)". I was confused since this is a wildcard cert (ie. "*.
example.com") but on a whim I verified the root domain ("
example.com") at which point the original certificate appeared in the interface for both me and the owner of the project.
So all is good it seems, but the workflow is a mess. Just an example: I added a new subdomain (ie "
foo.example.com") after verifying the root domain ("
example.com") and I had to verify the subdomain separately! I what world is it possible for someone to have control of the root DNS but not have control of the subdomain DNS ?!
Attila