Description of problem:
I was trying to paste a file into my Dropbox folder, using File manager. I did it twice in a row, crashed both times.

Version-Release number of selected component:
Thunar-1.6.4-1.fc20

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        /bin/Thunar
crash_function: g_source_destroy_internal
executable:     /usr/bin/thunar
kernel:         3.18.6-100.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            26770

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 g_source_destroy_internal at gmain.c:1223
 #1 g_source_destroy at gmain.c:1257
 #2 timeout_handler_destroy_source at dbus-gmain.c:309
 #3 _dbus_timeout_list_remove_timeout at dbus-timeout.c:347
 #4 protected_change_timeout at dbus-connection.c:848
 #5 _dbus_connection_remove_timeout_unlocked at dbus-connection.c:895
 #6 _dbus_connection_queue_received_message_link at dbus-connection.c:509
 #7 _dbus_transport_queue_messages at dbus-transport.c:1157
 #8 do_reading at dbus-transport-socket.c:883
 #9 socket_do_iteration at dbus-transport-socket.c:1194