Comment 7 for bug 676488

Still investigating, but I suspect this is a bug in polkit since:

1) the same code for CJ works in maverick
2) this bug is affecting multiple different packages

I'm guessing that the type for start-time got erroneously changed from uint64 to string. This page still describes start-time's time to be the former:

http://hal.freedesktop.org/docs/polkit/eggdbus-interface-org.freedesktop.PolicyKit1.Authority.html