So, due to some frustrating circumstances, my bass was left unplayed for a few months. When I returned to play it, the G string was so low that it was almost touching the fingerboard. It looks like it has fallen at the bridge end, as the height at the nut seems fine. It'll make a (buzzy) sound if played below 3rd position, but anywhere above that and the vibration is killed by the fact that it is pretty much flat against the fingerboard. I can't be entirely sure, but it looks like the D string has also fallen slightly too, although this does not affect how it sounds. Has anyone experienced anything similar to this? What caused it for you? A few months before this happened, I installed a K&K Bass Max pickup, which required me to file down a part of the bridge (like this: http://www.uptonbass.com/catalog/images/bassmax.jpg) on the E string side - could this have somehow caused it to "lean" to one side? If anyone has any comments/ideas, please let me know. Thanks!