Experienced for example when saving an image.

When saving a file, a default filename is shown in the save dialog box. As
soon as you change the directory, the filename field is empty. This is very
annoying when you want to save the file under the same name as it is found
on the webserver.

Suggestion: Don't clear the filename field when when changing the directory.

Probably this is really an issue with some GTK/GNOME widget, not even
Galeon. If Galeon can work around that, it would still be nice.