FYI: As a workaround, I tried adding the same gmail address I've been using, but without the .'s in it, as a developer.
No dice. It let me accept the invitation, but then the new non-dot developer disappeared from the Permissions list. So, apparently, GAE recognized that the two emails were actually the same google account. On the advice of google (over at the production issue report), I've rejiggered my app to send from a different email account, and notified my users of the change. -Joshua -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.