Consolidated "UA/Partner flights (miles) not posting?" thread
Interestingly enough, though my wife's 4 US segments from last Wed. ans Sunday haven't credited - she also flew SEA-SFO on UA and was credited for that in normal time. This was a US ticket with all US flight numbers. Weird thing is in the line where it credits on MP (both regular site and iPhone app), it lists both the US flight number and fare class as well as operating UA flight number and fare class. I've never seen codeshares post that way before - I've always only seen operating carrier info.