I've always thought it was proper for the loser to salute first, but I also realize that not everyone believes what I do. I generally salute win or lose if I think it was a good fight. Heck, I've saluted 2 weekers just for trying to fight. It's nice to get a salute but I certainly don't expect them.
As far as i'm concerned the ole boy you speak of in your fight, cancelled out any hopes of a salute then and in the future when he PMed you in a rude fashion.