"We got embarrassed today by a number of errors and I think it was on the back of a general malaise - a bit of flatness in the group for some reason," said Munster head coach Rob Penney.
"We'll be looking at what we did all week in terms of mental preparation to see if there was something amiss there. We may have got a bit ahead of ourselves.
"We are ruing some poor mental preparation, I would suspect, because you don't change from one week to the next physically in any way. I don't think our mental application was where Edinburgh were = that was self-evident.
"We weren't good at all but that's not taking anything away from Edinburgh. We weren't allowed to be good."