In Encore DVD v2 there is a new feature. Actually, there're loads of new features but just one is causing you a little bit of grief here. V2 allows you to specify an end action at the end of each chapter of a clip on a timeline. Previously the entire timeline had to completely play before any end action (i.e. that of the timeline) would kick in, typically taking you back to the menu or maybe play a second timeline.
What the message you have is telling you is that the final chapter of one of your timeline has an end action set. the end action of the last chapter will kick in before th eend action of the end of the timeline (even though it's really the same thing) and so Encore is letting you know that the end action of the timeline will never be reached. That's all.
I can't imagine it will make any difference but as Encore clearly 'wants' you to have the end action on the timline I suggest you do that if only to stop all the whinging.
Hope this is clear. Letme know how things turn out.
And how do you like v2 then. I find it much more stable than v1 or 1.5 and so far I love the slideshow feature. Great stuff.