I appreciate it when people tell me about formatting glitches in my posts, and I’m sure other bloggers do, too.
But if you see such a glitch, it would be best if you e-mail the blogger about it rather than posting it in the comments. First, I may not read the comments for a while. Second, if the glitch is something clearly visible, such as an unclosed italics or bold tag, I will have already seen it before I read the comments (since to see the comments I also have to see the full post).