Maintain Stable Versions
Maintain a specific version until a client understands and accepts the update. Surprise changes wastes time and adds frustration. All of a sudden things like Shading pops up in my text and I do not know where it came from and there is nothing in the help system that points me to the very simple method to either change or turn it off. As an example Ctrl + Shift + U adds or removes underlines. In my case the text is highlighted with a random color.
I've been with Adobe and other software providers who never organize and present the very simple procedures within their applications. Do not assume that Adobes customers know everything Adobe knows, it's called dealing with the lowest common denominator. We all have time where things popup that users may have not accomplished a feature.