--- gsettings.py	2013-11-13 10:35:44.862565416 +0100
+++ /usr/lib/python2.7/site-packages/gtweak/gsettings.py	2013-11-13 09:35:32.065577698 +0100
@@ -34,6 +34,8 @@
     def __init__(self, schema_name, schema_dir=None, schema_filename=None, **options):
         if not schema_dir:
             schema_dir = gtweak.GSETTINGS_SCHEMA_DIR
+        if schema_name == "org.gnome.desktop.wm.preferences":
+            schema_filename = schema_name + ".gschema.xml"
         if not schema_filename:
             schema_filename = schema_name + ".gschema.xml"
 
