"Would you say irreducible complexity is a myth/misunderstanding?"

Irreducible complexity is a term coined by a creationist and his examples has been refuted by the scientific community as far as I know.
http://www.talkorigins.org/faqs/behe.html

Also the dover trial ruled:
"Professor Behe's claim for irreducible complexity has been refuted in peer-reviewed research papers and has been rejected by the scientific community at large"
http://en.wikipedia.org/wiki/Irreducible_complexity

Sadly the pseudo science of creationism and ID is good at propaganda and these are so complex things so you cannot demand that people have studied biology for 10 years before making a decision. So sadly a lot of people swallow the propaganda and truly believes that ID is scientific movement or that evolution is as much as a belief as a religion.