This is an irritating problem. It doesn't stop anything from working, but the error doesn't make sense.
I have created a list template. When I add the list to a webpart, everything is fine. But if I want to edit the webpart that contains the list I get "Error: List does not exist. The page you selected contains a list that does not exist. It may have been deleted by another user." When I go back to the site, the changes are made.
Why is this error showing? It isn't affecting anything but why is it even coming up?