Please describe the problem:
The file chooser dialog allows selecting multiple files. If the user selects multiple files and clicks the OK button (with the mouse), gtk_file_chooser_get_filenames returns all the filenames (as it should). If, however, the user selects multiple files and presses Enter, that function returns only one filename.

Steps to reproduce:
1. Run "zenity --file-selection --multiple".
2. Select multiple files.
3. Press Enter.

Actual results:
Only one filename is printed.

Expected results:
All the selected files should've been printed.

Does this happen every time?
Yes.

Other information:
This is not a bug in zenity. I get the same behaviour if I create the dialog from Python (PyGTK).