Please describe the problem:
In the Save As dialog, when I select a directory from the list on the left (one I've added myself or my home or Desktop directory), the current contents of the filename box are lost. I think this is a Gtk+ problem because it happens in firefox and gimp.

Steps to reproduce:
1. start gimp
2. open some image file
3. File>Save as...
4. doubleclick on e.g. Desktop


Actual results:
the Name: field is cleared

Expected results:
the Name: field keeps its contents

Does this happen every time?
It happens semi-regularly, e.g. I can't reproduce it in firefox right now; and for some images I have to do it twice, i.e. doubleclick Desktop again. This seems to "work" for all images in gimp.

Other information: