Description of problem:

When a USB cable is inserted, eggcups is run (evidently), and a dialog
appears telling that "application eggcups crashed".

Version-Release number of selected component (if applicable):

desktop-printing-0.19-4.1
dbus-glib-0.60-1.1
dbus-python-0.60-1.1
dbus-0.60-1.1
dbus-x11-0.60-1.1

How reproducible:

100%

Steps to Reproduce:
1. Plug in a USB printer
  
Actual results:

Lots of pointless disk activity and an error.

Expected results:

No error (either eggcups working or not running eggcups at all).

Additional info:

Backtrace was generated from '/usr/bin/eggcups'

Using host libthread_db library "/lib/libthread_db.so.1".
`shared object read from target memory' has disappeared; keeping its symbols.
[Thread debugging using libthread_db enabled]
[New Thread -1209100624 (LWP 21126)]
0xffffe410 in __kernel_vsyscall ()
#0  0xffffe410 in __kernel_vsyscall ()
#1  0x4f2b218b in __waitpid_nocancel () from /lib/libpthread.so.0
#2  0x4edd609d in gnome_init_with_popt_table ()
   from /usr/lib/libgnomeui-2.so.0
#3  <signal handler called>
#4  0xffffe410 in __kernel_vsyscall ()
#5  0x4efbcf7c in raise () from /lib/libc.so.6
#6  0x4efbe3e3 in abort () from /lib/libc.so.6
#7  0x4ead6655 in dbus_malloc () from /usr/lib/libdbus-1.so.2
#8  0x4eac10c8 in dbus_watch_set_data () from /usr/lib/libdbus-1.so.2
#9  0x4eac4dd6 in dbus_watch_set_data () from /usr/lib/libdbus-1.so.2
#10 0x4eaa00f7 in dbus_error_has_name () from /usr/lib/libdbus-1.so.2
#11 0x4eaa0142 in dbus_error_has_name () from /usr/lib/libdbus-1.so.2
#12 0x4eaa66ee in dbus_message_iter_append_basic ()
   from /usr/lib/libdbus-1.so.2
#13 0x080576e4 in ec_driver_prompt_dbus_message_handler (
    connection=0x80d4530, message=0x80d4f40, user_data=0x806f260)
    at ec-driver-prompt.c:240
#14 0x4eaab584 in dbus_message_new_method_return ()
   from /usr/lib/libdbus-1.so.2
#15 0x4ea96fbd in dbus_connection_dispatch () from /usr/lib/libdbus-1.so.2
#16 0x4eea48de in dbus_server_setup_with_g_main ()
   from /usr/lib/libdbus-glib-1.so.2
#17 0x4f23c943 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#18 0x4f23f893 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#19 0x4f23fc3c in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#20 0x4f695d3c in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#21 0x0804ef71 in main (argc=) at main.c:206
#22 0x4efaa5b4 in __libc_start_main () from /lib/libc.so.6
#23 0x0804e9c1 in _start ()

Thread 1 (Thread -1209100624 (LWP 21126)):
#0  0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#1  0x4f2b218b in __waitpid_nocancel () from /lib/libpthread.so.0
No symbol table info available.
#2  0x4edd609d in gnome_init_with_popt_table ()
   from /usr/lib/libgnomeui-2.so.0
No symbol table info available.
#3  <signal handler called>
No symbol table info available.
#4  0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#5  0x4efbcf7c in raise () from /lib/libc.so.6
No symbol table info available.
#6  0x4efbe3e3 in abort () from /lib/libc.so.6
No symbol table info available.
#7  0x4ead6655 in dbus_malloc () from /usr/lib/libdbus-1.so.2
No symbol table info available.
#8  0x4eac10c8 in dbus_watch_set_data () from /usr/lib/libdbus-1.so.2
No symbol table info available.
#9  0x4eac4dd6 in dbus_watch_set_data () from /usr/lib/libdbus-1.so.2
No symbol table info available.
#10 0x4eaa00f7 in dbus_error_has_name () from /usr/lib/libdbus-1.so.2
No symbol table info available.
#11 0x4eaa0142 in dbus_error_has_name () from /usr/lib/libdbus-1.so.2
No symbol table info available.
#12 0x4eaa66ee in dbus_message_iter_append_basic ()
   from /usr/lib/libdbus-1.so.2
No symbol table info available.
#13 0x080576e4 in ec_driver_prompt_dbus_message_handler (
    connection=0x80d4530, message=0x80d4f40, user_data=0x806f260)
    at ec-driver-prompt.c:240
	method =