Version:           1.9.52 (using 4.00.85 (KDE 4.0.85 (KDE 4.1 >= 20080703) "release 1.1", KDE:KDE4:Factory:Desktop / openSUSE_11.0)
Compiler:          gcc
OS:                Linux (i686) release 2.6.25.5-1.1-default

When I save an attachment its original filename is cleared in the "Location" edit field once I choose the first directory in the directory browser.

Steps to reproduce:

1. Open a mail with an attachment in it
2. Open the context menu over the attachment and choose "Save As..."
   A file dialog appears with the attachments file name pre-filled in the Location field.
3. Click on a directory in this dialog.
4. The contents of "Location" are cleared unexpectedly.
   The target filename in "Location" should not be cleared during browsing in directories, it should only be overwritten on choosing a file (not a directory) with the name of the file chosen, or on editing the "Location" contents manually.