I've just recently upgraded the system. The newly compiled polkit (polkit-0.106-r2) either dies while trying RWX mapping or if I disable mprotect on the binary it eats the CPU resources.
I have to explicitly specify gradm-2.9.1.201206091838, because the system thinks gradm-2.9.201202232055 is more recent. Clearly because of the additional version digit. Regards: Dw. -- dr Tóth Attila, Radiológus, 06-20-825-8057 Attila Toth MD, Radiologist, +36-20-825-8057