I'm getting back buzz when i play the E string on the 8th fret on my bass together with the G strig. I just adjusted the truss rod for some relief (barely 1/4 of a turn) and i'm gonna do a bit more tomorrow, so far it hasn't gone away. Oddly enough tuning the e string higher gets rid of it so i'm sure it's the relief, it's my first winter with the bass so the neck probably got a bit tighter since it's almost winter, right?