I have SuperDuper! set up to run automatically every night and so I only occasionally start it up interactively, to check the logs and make sure all is well. When I did so this morning it reported that it has been unable to contact the update server to check for new versions for several days. Sure enough, when I select the "Check for Update..." command from the main menu, I get this response after a few seconds:
Now, I didn't contact support via email because this frankly isn't an emergency for me---SuperDuper! is working just fine---and I didn't want to bug Dave. But I thought I'd post here just to see if this is a known issue.