I had that happen a few times although we may not have the same cause.  I went into a working app and found that all the pages of the app, except the home page had no content.  the borders, shading, colors, page frames were all there without any content at all.  our app consists of text and custom modules.  During this time, the other two developers on the project could see everything and the only thing that cured it was for me to delete myself as a user (the developers are Admins and Hosts) and re-add myself.  Of course I had to change all the occurrances of my old User ID with my new User ID, in all necessary tables.

BTW, I had to add myself again a while ago.

So.  I am waiting to hear about solutions to your request.

MichaelM