I've heard a few players say "something has changed in the FM of plane XX"
Think about this:
over 50% of the fields in AK Pizza are relatively high. Winds in the arena are currently at 14,000 feet, 30 MPH, traveling West to East. If your dogfighting at a higher field, then you *may* be encountering a wind layer that will do strange things to your aircraft.
Rest assured, if HTC changes a FM, they inform everyone! They have since 1995, don't see why they'd change their policy now....