Originally Posted by mauld
So from that I can guess, that some lucky C class passengers were upgraded to F???
With C was oversold at boarding time, you wouldn't sit there, now. If you got the seat from a pax who upgraded to F, chances are that he paid 50,000 miles for this privilege. Btw, a one-way upgrade from coach to Business costs costs 50,000 M&M miles, too, and it's only available for V class or higher. Then again, we all know "LH hates UA elites", right?
Also, the rules that count are those printed on the certificate. However, if you insist on consulting online reading matter, there's an official page on ual.com explaining the upgrade rules for certificates. It's
http://www.united.com/page/article/0,1360,50027,00.html. And it clearly says:
"1a. Lufthansa Standby: This upgrade may be used on a standby basis, subject to availability, on the day of travel on any eligible Lufthansa flight in accordance with the terms and conditions of this certificate, except when booked in LH booking classes X, I, R, N, W, S and E. In addition L and T fares are also excluded for Intra-Europe flights." Pretty much the same restriction as the one on the printed certificate.