I also encountered this problem: Problem with the new last.fm connect
I avoid this by simply not caring that much about the accuracy of the timestamp of the scrobbles when manually adding scrobbles (for example, with openscrobbler.com).
I also encountered this problem: Problem with the new last.fm connect
I avoid this by simply not caring that much about the accuracy of the timestamp of the scrobbles when manually adding scrobbles (for example, with openscrobbler.com).