Yes, the open A buzzes on one of my basses and it drives me nuts! Firstly, let me get it out of the way that this is NOT an issue with headstock angle, string wraps, witness points, or not having enough pressure on the string at the nut (unless there is a design flaw with the headstock...which is not likely). So, buzz only on the open A. I mean, I like low action and I get some buzz here and there but this is far worse and makes the bass unplayable for me. Eventually I am going to have the frets professionally dressed, probably Plek'd but until I can afford that, is this possibly a situation for a new nut? The bass is maybe 15 years old and I bought it used so I don't know what all has been done to it over the years so it probably needs some attention.