<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by swaghmar:
One of the most important things about redemption when comparing Star Alliance & OneWorld is that none of the Star Alliance partners let you make date changes on the return once the journey has begun.
Example - United, Lufthansa, Mexicana.
OneWorld on the other lets you make as many date changes as you want for free. </font>
When I used Qantas miles to book a ticket with BA I had same problem. Qantas says BA won't let them change the dates. Not sure if that is true or not, but I never needed anyway.