I use FileChooserDialog in both scripts; set_select_multiple is the option connected only to FileChooserDialog. I could use gtk.FileChooserDialog - as you see in the attached script -, but in that way I will miss the "hildonish" look, as it opens a gtk window with small fonts, etc (as you can see if you run the script). That is why I wrote that the GTK version is working, but the Hildon version doesn't.