Buggy is an understatement.
I am on 12-core Mac with 32GB of RAM running OS 10.10.4. I am using Adobe Edge Animate CC 2015.0 Release.
Here is what I have encountered with this "release":
1) Preview in browser does not animate, stuck on first frame.
2) Recreated the banner ad that was stuck on the first frame from scratch and hit Preview in browser. It now animates.
3) Text changes sizes and weights when editing. If you delete text(Google Font: Lato) you have to constantly enter the correct weight and size or it will default to another size and weight.
4) After recreating the banner, having it animate. I continued animating down the timeline. I was DONE, or close to it. I hit Preview in browser. NOTHING. White screen.
My animation is not that complicated. I have lines of text flying in. They are scaled 250%, opacity is 0 and they are offset. They tween to 100%, opacity 100%. If I move the playhead in the authoring environment, all is well. When I hit preview in browser. NOTHING. Just a white screen.
Hours of work down the toilet. I hesitate rebuilding in fear that it will happen again.