I know that this is way too late in the day to comment, but it may be a sensible move for the future.
Rather than the users treating this Beta and RC software as final, It would help a lot if they did actually help with the bug tracking / solving rather than just saying me too.
To that end even something simple like including the :-
in the beta / rc's would be helpful. That way it would only be a case of posting the file up after the problem had happened rather than recreating it.
We all choose to run the beta software, it is our responsibility to give Tom and the team as much information as possible back to solve the problems.
Don't get me wrong, this isn't a complaint about anybody, and the 'me too's' do help in so far as giving some indication as to the scale of the problem. It's just that the more information given the easier the problem is to track down.
Good luck Tom, I don't envy you.