Index: twisted/web2/dav/method/report.py
===================================================================
--- twisted/web2/dav/method/report.py	(revision 26969)
+++ twisted/web2/dav/method/report.py	(working copy)
@@ -94,8 +94,9 @@
     namespace = doc.root_element.namespace
     name = doc.root_element.name
 
+    ok = string.ascii_letters + string.digits + "_"
+
     def to_method(s):
-        ok = string.ascii_letters + string.digits + "_"
         out = []
         for c in s:
             if c in ok:
@@ -105,10 +106,17 @@
         return "report_" + "".join(out)
 
     if namespace:
-        method_name = to_method(namespace + "_" + name)
+        method_name = to_method("_".join((namespace, name)))
+
+        if namespace == davxml.dav_namespace:
+            request.submethod = "DAV:" + name
+        else:
+            request.submethod = "{%s}%s" % (namespace, name)
     else:
         method_name = to_method(name)
 
+        request.submethod = name
+
     try:
         method = getattr(self, method_name)