GtkD "No GSettings schemas installed"

[Josh]

This is the code causing the problem:

class myInputDialog : Dialog
...
this()
{
    super("Please enter file location...", this, 
GtkDialogFlags.MODAL | GtkDialogFlags.DESTROY_WITH_PARENT, 
[StockID.OK], [GtkResponseType.OK]);
    with (addButton(StockID.OPEN, GtkResponseType.NONE))
    {
        setLabel("_Find file");
        addOnClicked(&findFile);
    }
    addButton(StockID.CANCEL, GtkResponseType.CANCEL);
...
    Entry fileLocInput = new Entry();
...
}
void findFile(Button but)
{
    FileChooserDialog fileWindow = new FileChooserDialog("Use 
File...", this, GtkFileChooserAction.OPEN, ["Open", "Cancel"], 
[GtkResponseType.ACCEPT, GtkResponseType.CANCEL]);
    fileWindow.run();
    writeln(fileWindow.getFilename());
}

It produces the error "GLib-GIO-ERROR **: No GSettings schemas 
are installed on the system". The command prompt window in the 
background says "This application has requested the Runtime to 
terminate it in an unusual way. Please contact the application's 
support team for more information." and then appears to segfault.

Windows 7 x64, DMD v2.060, GTK+ Runtime 3.4.2, GtkD 2.0

Anyone know why this is happening? If I comment out the 
addOnClicked(&findFile) bit, findFile never runs and the problem 
doesn't happen, except I can't browse for files.

Thanks,

Josh