@Kev999 - I used to use it in the effects bin all the time, without issue. Having said that I know that you could apply it as a clip effect also, as per what you're saying. Also I think the Time/Pitch Stretch 2 plug is a different beast to the Pitch Shifter
@Scook - i figured it might be some compatibility/stability issue also. Having said that I found it on my set of Sonar 8 disks and re-installed it - seems to work ok so far!