Some strings are untranlasted and seems to not be in the POT files. Concerned strings are those are displayed when mouse is over some links: all links in the "Navigation" menu and the first link of "Fedora Websites". These strings are probably those its are in the "title" attribute of the html <a> tag.
This is a bug that is caused from the intltool pacakge, see: http://bugzilla.gnome.org/show_bug.cgi?id=449756 Once it's fixed, an update is released, and the package maintainer pushes it to our updates system, strings will be extracted correctly and become translatable.
Ok, thanks