Niels,…the length of the animation had no effect. There is something that is interesting though and possibly helpful to you. The Samsung Notebook Pro 9 15″ is a convertible tablet. So when using the stylus to draw etc,..normally you close it up so it is in tablet form; this is how I work as well. After seeing that the play button would not work unless I accessed the menu bar I decided to unfold and put the tablet back into laptop form (in which nobody would ever use for art) and amazingly the normal play button control worked just fine when accessed with the mouse pointer!! So something is definitely going on in relation to the stylus.