EXS 24 Logic Sampler Users Group

Anyone having a problem with exs instruments suddenly being out of tune?
Seem to be a bit sharp.
It's been happening on and off lately.
Starts out fine then it's out.
Happens with various instruments.
So it's not the one sampler instrument, it's a global thing.
Logic 7.0.1 and Panther 10.3.9.
Just started happening.

thanks
tom