Oxford University researchers have released a top 10 list of irritating phrases. The link is to a British newspaper story that uses "comprises" correctly, by the way.
One word that makes me cringe lately is "enormity." Television journalists speak of the "enormity" of President-elect Barack Obama's tasks once he is inaugurated. I suppose usage is changing, but I still think "enormity" refers to great wickedness, not to great size or importance.