mozplugger in rawhide needs to get upgraded to 1.7.2. It has been out for a while, and we are still working with 1.7.1. The newest version fixes some bugs including the frame obscuring bug, some mozpluggerrc bugs, and it adds support for evince, which everyone loves.
I know, but 1.7.2 is still a development release, which i don't want to build it in rawhide yet. but it will be built when a stable release will be released.