OK, this bug was caused by a changed behavior of lpadmin. After fixing the Brother-driver to use a different command, it works (the PPD file got copied, evince seems to need this file to get to know the printers features). You may close this bug, thanks.
-- Unable to print PDF-files on a network-printer (IPP) https://launchpad.net/bugs/68122 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
