Had a crash going into CYYZ the other day around FL250 - 100% CPU usage with 5 cores around 40% kernel (not user) time. I suspect it had something to do with the problems here.
Today, updated GSX2, used P3D 4.3 and TFDI 717 from FlyTampa CYYZ to ImagineSim KATL. No issues whatsoever. Previously, deleted shadercache and scenery indexes. I'll fly more this weekend to test.
Cheers!
Luke