LC stack version changes between 8 and 9

[Bob Sneidar]

Is there a stack version change from 8 to 9? If so, I would be averse to developing much in 9 except to play around a bit just to help out. If not, and I was reasonably assured no stack corruption was going to take place (obviously there are no guarantees, and I do make versioning backups) then I thin I would like to start using V9 for my daily developing. 

Or should I wait until the first RC? 

Bob S