For a certain presentation which shows up immaculately fine in PP 2007 on Windows and in PP 2008 on the Mac, I see unadorned slides showing up in the sidebar and the slide sorter see. Nothing I do can compose their substance show up. What's even stranger is that on some of the aforementioned slides, some of the slide protests are intangible until I click on them! Moving to a distinctive slide then after that returning to the derailed slide makes the items concealed again Quite abnormal absolutely pestering. I fundamentally cannot alter the proposed slides in 2011. Serve some useful purpose!