MQM earn on select fares class have changed

As of March 1, 2013, the MQMs SkyMiles members earn on select fares have changed:
For Delta-marketed flights, the MQM bonus for First/Business F and J fare classes has doubled from 50% to 100%, and Economy M fare class no longer earns a 50% MQM bonus. This change applies to tickets purchased on or after March 1, 2013.
The above changes also apply to F-, J- and M-equivalent fare-class tickets on Aeromexico-, Air France-KLM-, Alaska-, Alitalia- and Virgin Australia-marketed flights. This change applies to travel flown on or after March 1, 2013.
The MQMs you earn on certain other partner-marketed flights have been adjusted for travel flown on or after March 1, 2013. Visit delta.com/partnerairlines for details by carrier.
Please note that the way you currently earn redeemable miles has not changed.