- ZPublisher would fail to recognize a XML-RPC request if the
        content-type header included a 'charset' parameter.

doc/CHANGES.txt

@@ -58,6 +58,9 @@ Zope Changes
 
     Bugs fixed
 
+      - ZPublisher would fail to recognize a XML-RPC request if the
+        content-type header included a 'charset' parameter.
+
       - Forward-ported 'aq_acquire'-related fix and associated tests
         from Zope 2.7.4.
 

lib/python/ZPublisher/HTTPRequest.py

@@ -384,7 +384,7 @@ class HTTPRequest(BaseRequest):
         if not hasattr(fs,'list') or fs.list is None:
             # Hm, maybe it's an XML-RPC
             if (fs.headers.has_key('content-type') and
-                fs.headers['content-type'] == 'text/xml' and
+                'text/xml' in fs.headers['content-type'] and
                 method == 'POST'):
                 # Ye haaa, XML-RPC!
                 global xmlrpc