Created attachment 677056 [details] the error message Description of problem: Attempting to open a.pps file i get the error from the title. It seems to be this bug, actually: https://bugs.freedesktop.org/show_bug.cgi?id=38370 Version-Release number of selected component (if applicable): # rpm -q libreoffice-impress libreoffice-impress-3.5.7.2-7.fc17.i686 How reproducible: always Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info: If my understanding is correct, these are presentation files password protected against modifying, but that can be opened read-only without a password. Indeed, i can open the file with PowerPoit Viewer without entering a password.