When I show the frame rate value, another value shows alongside which constantly jumps between 0.9 and 1.0. What is this. Also, as this jumps about, gauge values jump as well. This also ties in with the vertical speed value constantly going positive and negative on all aircraft. It's as though FS2002 has gone a little unstable. How can I get the stability back.Thanks for all help.Nick.

You mean the G meter which registers the force of gravity on the aircraft? Probably happens if you hit turbulence.

Thanks, turned off turbulance in FSUIP and that stopped it from happening.Nick.