I've got this friend and he's been having some problems with an acoustic-electric Tacoma Olympia bass. He doesn't live in a humid climate at all, but apparently, something has caused select frets to make a nasty, tinny, flat sound. Previously, this occured on the 7th - 14th frets of the G string. The problem was fixed, but for whatever reason the bass was replaced. It's happened again, but this time only on the 12th fret of the G string. Does anyone know if this is a recurring problem with Tacoma Olympias, or is this some kind of strange, isolated incident?