Description of problem:
Re-create error by:

enable "preview for local files only" in Thunar
Create a PDF on Desktop (by printing to PDF)
Move File from Desktop to a directory in Thunar
Wait 2 seconds
Move File from Thunar back tu Desktop
Thunar crashed

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

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        /usr/bin/Thunar --daemon
crash_function: memmove
executable:     /usr/bin/thunar
kernel:         3.17.8-200.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 memmove at ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:1551
 #2 delete at dbus-string.c:1183
 #4 _dbus_string_delete at dbus-string.c:1208
 #5 load_message at dbus-message.c:4178
 #6 _dbus_message_loader_queue_messages at dbus-message.c:4252
 #7 _dbus_transport_get_dispatch_status at dbus-transport.c:1101
 #8 _dbus_transport_queue_messages at dbus-transport.c:1128
 #9 _dbus_connection_get_dispatch_status_unlocked at dbus-connection.c:4238
 #10 dbus_connection_get_dispatch_status at dbus-connection.c:4369
 #11 message_queue_prepare at dbus-gmain.c:71