Here's where I apologize for being such a moron. "Fuzziness" has so much to do with the .jpg quality setting sitting, for some unexplained reason, at 55% instead of the default 95%.
Thanks for such quick replies, guys. Man, do I feel stupid.
I've been using Paint.net on my PC for a couple of years for creating web site graphics. Lately I got a laptop and when I create Paint.net graphics and upload them to the server, they're always fuzzy--aliased I think is the term. Why is this happening only from the laptop?