Gksu complains about missing gksu-run-helper "The gksu-run-helper command was not found or is not executable." [alecs@rainsoul ~]$ ls /usr/lib64/libgksu/gksu-run-helper /usr/lib64/libgksu/gksu-run-helper Creating a symlink /usr/lib/libgksu -> /usr/lib64/libgksu solves issue.
libgksu-2.0.12-alt4 -> sisyphus: * Sun Dec 12 2010 Yuri N. Sedunov <aris@altlinux> 2.0.12-alt4 - gksu-run-helper installed in %_libexecdir not %_libdir (ALT #24742)