I know I make mistakes all the time. In fact, my joke is that I'm bilingual because I speak fluent English and Typo. I do my best to catch them, but sometimes I see something on the site and think, "Oh, brother! How long has that been like that?"
Sometimes, I get disturbed by the number of mistakes, errors, and typos I see in things that are supposedly professionally produced. Not too long ago I was in a store that had printed signs that read, "Take an ADITTIONAL 50% off." (Yes, I do have photographic evidence!) I couldn't decide what was more unfortunate - that someone had spelled "additional" that way, in all caps no less, or that apparently no one working in the store had noticed. Or maybe they had noticed, but simply didn't care?
It reminded me again of the importance of editing my own work. If you come across something that needs fixing or cleaning up here at HC USA, please don't hesitate to point it out to me. The conventions of grammar and spelling were created and set down to make sure that as little as possible was left to chance when it came to understanding what is being written or said. I want to adhere to that notion as much as possible. I can be hard enough to understand as it is. I don't need to go making things worse with incomprehensible, typo-filled "explanations." :)