Index: docs/reference/gtk/tmpl/gtkprintsettings.sgml
===================================================================
RCS file: /cvs/gnome/gtk+/docs/reference/gtk/tmpl/gtkprintsettings.sgml,v
retrieving revision 1.5
diff -p -u -u -p -r1.5 gtkprintsettings.sgml
--- docs/reference/gtk/tmpl/gtkprintsettings.sgml	5 Jun 2006 19:33:18 -0000	1.5
+++ docs/reference/gtk/tmpl/gtkprintsettings.sgml	20 Jun 2006 16:59:22 -0000
@@ -18,6 +18,10 @@ the settings for the next time your app 
 document. The predefined keys try to use shared values as much as possible 
 so that moving such a document between systems still works.
 </para>
+<para>
+The settings keys must only consist of printable ASCII characters excluding
+"=" and ";" and not contain whitespace; and the settings values must be in UTF-8.
+</para>
 
 <!-- TODO example of getting, storing and setting settings -->
  
