I've been blogging for a while and yet am still surprised whenever someone takes the time to read a post and share a comment. But you wouldn't know I felt that way if you were the one sharing a comment and seeing that comment displayed in xx-small font. So I finally took a few minutes to figure out how to increase my blog's comment font using the .Text Admin-->Options-->Config-->Custom CSS Selectors.
I added the font-size setting below to the /skins/blue/style.css excerpt to my custom settings. i.e., cut-n-paste the following into the Custom CSS Selectors textbox if you're blue and want to increase your comment font size.
I'm not a CSS stud by any means, so this was another instance where producing the desired effect was facilitating by having spent some quality time with ScottW's .text source....