software

A month ago, the action was twice lower than it is now, with the same strings, same brand, same amount of relief... GRRRRRRR... I just can't get it back there without a lot of buzz. I'm totally clueless. Does it ever happen to you? One day, she'll play amazing, then you restring her and with the same setup you usually do, it's totally different?

humidity change or temp change can do that. . . .one time the water heater popped and sprayed my jackson for two days with water! Along with some foot pedals and about 300 CD/Tapes . . . . neck had a little buzz for awhile after that LOL! ! ! She is fine now.

Yeah... it got way colder here. I adjusted the neck to its usual relief, but now that you mention it, it could be the strings or the whole neck that changed behavior/shape.