Adobe - Microsoft: I love you...not

Adobe has already started to fight with Microsoft regarding the use of PDF format in the future version of MS Office. While Adobe's David might look so small to Redmond's Goliath, he has chosen to team up with the European Commission to force the giant to follow the law, and not his law.
It remains so far unclear if the PDF dispute is the real problem, or rather the excuse for Adobe to settle old or on-going conflicts with Microsoft. It might also be one way to negotiate with Microsoft regarding the future MS format XPS that the giant is planning to "enforce" to the rest of the world.