Side-Pane-Tree strange behavior

Hi,

if i use Thunar with Side-Pane -> Shortcuts (Strg+B) everything works fine. If i change this to Side-Pane -> Tree (Strg+E) everything works fine in the current session. After a reboot the first start of Thunar (with Tree-View) takes 15 seconds and Thunar starts twice. If i change the Side-Pane view back to Side-Pane -> Shortcuts (Strg+B) and reboot, everything works fine again, Thunar start in less then one second and opens only one window like expected. I think there could be a bug with Thunars Side-Pane --> Tree-View ...

Thanks

Description: Ubuntu 14.04.1 LTS
Release: 14.04

thunar:
Installed: 1.6.3-1ubuntu5
Candidate: 1.6.3-1ubuntu5
Version table:
*** 1.6.3-1ubuntu5 0
500 http://de.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
100 /var/lib/dpkg/status