[RobertJSawyer]

I ran into this problem with one of my own books and complained about it directly to Kobo. They said they ALWAYS serve up the originally purchased version to customers, even if they redownload; there's no way to get the revised version. Their rationale was that users who have made annotations are better off this way.

Amazon's Kindles work the opposite way: if you redownload, you get the latest version -- which is a much better approach, I think.