Dialog opening a link crashes on Mac 10.7

Using Mac package from http://origin.releases.qt-project.org/digia/5.0.0_rc1/backups/2012-11-19-345/

Using example qtbase/widgets/imageviewer

Steps to reproduce:
1 - File->Open
2 - select Pictures
3 - double click "iChats icons" (a folder link)
4 - the contents in "iChats icons" display correctly
5 - double click "iChats icons" again
6 - the file dialog disappear
7 - File->Open again, crashed

The application is crashing.

Note: this does not crash on Mac 10.8