When creating a default file chooser, putting a directory into the location entry and pressing enter does nothing at all. See simple code below which does this reproducibly.

Expected behaviour would be to jump to the directory specified. If the entry isn't a directory, go to the parent (or if that doesn't exist, it's parent, etc) and have the file selected if it exists.

Some examples of expected behaviour:
1. Enter /tmp into the location entry and press enter
 - Open /tmp and display its contents

2. Enter /tmp/myfile into the location entry and press enter
 - Open /tmp and have the file 'myfile' selected

3. Enter /tmp/notfile into the location entry and press enter
 - Open /tmp

Curiously, the file chooser used in programs like gedit don't have this problem. I'm not sure what extra signals they connect to do that, but the standard file chooser should do this by default.

Other information:
#include <stdio.h>
#include <gtk/gtk.h>

int main(int argc, char **argv) {
    GtkWidget *win, *chooser;
    gtk_init(&argc, &argv);
    win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    chooser = gtk_file_chooser_widget_new(GTK_FILE_CHOOSER_ACTION_OPEN);
    gtk_container_add(GTK_CONTAINER(win), chooser);
    gtk_widget_show_all(win);
    gtk_main();
}