"It's not that big a deal." Yes, it is. The client shouldn't expect to have to do my job. Grammar and spelling are my job here. I must be more careful going forward.
We're having a meeting today at 2:00, in a small group, to discuss how to make sure this doesn't happen again. I'm not looking forward to it. I was told that the point of the meeting was to discsuss process, not to just "point a finger at you," but I'd be OK with it if they did.