As a pastor, I really should be more aware of these kinds of issues than I am. I’m familiar with the most obvious ones, such as the woman caught in adultery and the end of Mark, but even in such cases, I’m often at a loss as to how to treat such passages. Should I skip them entirely, or preach them with a disclaimer? I’ve heard preachers preach them with disclaimers quite well. I’ve heard other preachers not give a disclaimer, yet subtly not treat them as authoritative (I kind of got that impression from Peter Hiett in a sermon on the woman caught in adultery, in which he quickly moved to Old Testament passages and used the passage in John 8 as more of an illustration…not sure if that was on purpose or not, but I did find it interesting).
Anyway, as Jason pointed out, pertaining to the Son of Man coming to seek and to save the lost, Luke 19:10 says the very same thing, and (as far as I know) there’s no question that this verse is authentic.