[Wouter Sel]

it feels rather buggy to me – previews and cache handling seem choppy, audio playback stutters
(video card driver and audio driver are up to date)
🙁

Also experienced some plug ins that got left behind with the update;
the update took some but not all my 3rd party plug ins from cc2014 to cc2015

I wouldn’t advise switching yet,
I’m thinking of moving my projects back to CC 2014.

[Wouter Sel]

Thanks for the reply Dan, I’ll give it a try!

meanwhile I’ve found this after some digging, and it works great:

posterizeTime(12); // value is in fps
r = Math.ceil(random(0,numKeys));
valueAtTime(key(r).time)

[Wouter Sel]

Still what Ted said, I guess.
My bet is one or more of the movs or precomps is one of these:

An adjustment layer
A 3D layer with a layer style applied
A 3D precomposition layer to which an effect, closed mask (with mask mode other than None), or track matte has been applied
A 3D precomposition layer without collapsed transformations”

source:
https://help.adobe.com/en_US/AfterEffects/9.0/WS3878526689cb91655866c1103906c6dea-7e3ba.html