There are a few things I noticed on my first attempt using the new Encore CS6 - and I did not have these issues with the previous edition.
Looking at an older project I did, it appears the photos I used for my new project were maybe a bit small. In a project I did from about 2 years ago, I opened it in Encore CS6; the images were about twice the size and I did not have any of the issues I have with the new project. I will run a new project using my older pictures and see if it works like it used to. I will update this forum with that info. Has anyone else experienced this?