It’s amazing how hard it is to proofread your own stuff. I just saw a glaring typo in the first line of a recent post; it sat there for more than a day before I spotted it. (If you didn’t see it, too late; it’s fixed.) It ruined the whole flow of the line, and I must have looked right at it dozens of times before posting.
Ah well. As Arthur said in The Once and Future King:
“If people reach perfection they vanish, you know.”