Comment 2 for bug 864530

StacktraceTop:
 datetime_interface_update (self=0x8f894a0) at /build/buildd/indicator-datetime-0.3.0/./src/datetime-interface.c:201
 session_active_change_cb (user_data=0x8f894a0, proxy=<optimized out>, sender_name=<optimized out>, signal_name=<optimized out>, parameters=<optimized out>) at /build/buildd/indicator-datetime-0.3.0/./src/datetime-service.c:1229
 session_active_change_cb (proxy=0x8f9cd20, sender_name=0x8f84738 ":1.18", signal_name=0x8fa32c0 "SystemIdleHintChanged", parameters=0x8fabd18, user_data=0x8f894a0) at /build/buildd/indicator-datetime-0.3.0/./src/datetime-service.c:1221
 ffi_call_SYSV () at ../src/x86/sysv.S:64
 ffi_call (cif=0xbf8821f0, fn=0x804ece0 <session_active_change_cb>, rvalue=0xbf8821a0, avalue=0xbf882140) at ../src/x86/ffi.c:303