Figured I should make a thread here for discussion on just this:

1.9 went live today, but the CK hasn't been updated. However we still have access to the 1.9.29.0 beta for the CK. Can we use this safely? Do we need a CK update for the patch?

As far as I can tell the released game version is still 1.9.29 and is the same as the last beta version.

Yeah I just checked ingame and it 1.9.29.0.8 so I assume the 1.9.29.0 CK will work just fine. I'm loading up my mod and I'll resave then check in TES5Edit if anything wonky happened.

EDIT: Well, I'm not entirely the most hardcoe person to be checking this out, but saving in the 1.9 CK beta seems to have no ill effects on the mod and looks safe to use.

My mod loads and runs just fine ingame it would seem. I personally deem the CK 1.9.29.0 beta safe to use. As always, make sure to back up your work first, just incase!

Though, I do get really weird mouse input delay and crazy jitter with 1.9...