User-Agent:       Mozilla/5.0 (Ubuntu; X11; Linux x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1
Build Identifier: Thunar 1.2.3

If you click simultaneously the back button on your mouse and left click Thunar chrashes with a Segmentation Fault.

Reproducible: Always

Steps to Reproduce:
1.Goto a subfolder where you are able to press the "back button".
2.Your mouse have to be on the area where you see the folders content (big area on the right side).
3.Now press the "back button" on your mouse and left click simultaneously to crash Thunar.
Actual Results:  
Every time Thunar closes the window and raises a Segmentation Fault.

Expected Results:  
Ignore the left click and go back to the recent visited folder.