Yes the sucky situation that I predicted has now occurred. MAny of us still had SWU's left until the beginning of the year and hence have been unable to "burn" the rest of our PMU's due to their early dates. I have one set left expiring in a week and will use them for a flight in March. Well, I guess we won't be having this problem much longer as personally the six I'll be sent soon will be burned by MAY!!