Description of problem: With pdb files mozpluggerrc suggests running alternatively /usr/X11R6/lib/xscreensaver/molecule. The problem is that nothing with such path could be found for a long while on Fedora installations. /usr/libexec/xscreensaver/molecule will be available if xscreensaver-gl-extras package was installed. Version-Release number of selected component (if applicable): mozplugger-1.12.1-2
it's fixed in 1.12.1-5. Thanks for your report