Been there and got the T-shirt! Posting a document or article can be a truly thankless task, as no matter how many times you check the document beforehand the Gremlins will always sneak something in. I always take corrections as a positive sign that at least someone is bothering to read what I've written!
Then just remember Muphry's Law, which states that "If you write anything criticising editing or proofreading, there will be a fault of some kind in what you have written."
This was subsequently elaborated to the following:
"Muphry's Law also dictates that, if a mistake is as plain as the nose on your face, everyone can see it but you. Your readers will always notice errors in a title, in headings, in the first paragraph of anything, and in the top lines of a new page. These are the very places where authors, editors and proofreaders are most likely to make mistakes."