--- a/rtags.py	Wed Apr 08 11:29:28 2009 +0200
+++ b/rtags.py	Wed Apr 08 11:30:32 2009 +0200
@@ -25,7 +25,7 @@
     def set_rtag(self, tag, rtype, role, stype='*', otype='*'):
         assert not self.use_set
         assert role in ('subject', 'object'), role
-        self._tagdefs[(rtype, role, stype, otype)] = tag
+        self._tagdefs[(str(rtype), role, str(stype), str(otype))] = tag
         
     def rtag(self, rtype, role, stype='*', otype='*'):
         assert not self.use_set