I'm sure that's not exactly what you want to hear, but I think that you'll find that most development teams who create apps will wait to push out updates to their app until they are sure that the people who are making changes to the underlying operating system are finished.
In this case, that means that Photosynth's team will wait to make sure that Apple's iOS team isn't going to make any other breaking changes before they update the Photosynth app.
I've seen the same situation before when I beta tested Windows Vista and Windows 7. People would find apps that had broken because something in Windows had changed and those broken apps would get reported, but even though the app makers were interested in taking a look at what they were going to need to change to make their app work on a newer version of Windows, they weren't going to spend a ton of time fixing their app until they were sure that Microsoft was finished changing Windows.
That's beta testing!