Yeah, there are a lot of "buzz" problems, but if its only related to one fret and as WW said, your fingering is OK, then its probably just a fret standing a bit high....they don't always get pressed correctly. One other possibility....have you changed strings? Try a new string first, before anything else. Long shot, but it happens.

Frets.com IS a great site and its in the regular links under "Instrument Related" with a hot link.

Spaw