Not sure if its the wide temperature swings here in the northeast recently but I'm have a heck of time getting the intonation right today. I have a show tonight so usually make sure the 2 basses I bring are cleaned, tuned and intonated. I'm a bit anal about intonation so I usually check open tuning to 12th fret, 17th fret and some of the middle frets. I can usually get this spot on but today with 2 different basses, 2 different tuners if I get the open and 12th set, the 17th fret is flat and the mid frets are sharp on both A and E strings. G and D strings are fine. Strings are pretty new on both, flats on one and rounds on the other. I have not had to tweak the truss rod. Any ideas?