--- etree.pyx.orig	2005-06-18 10:19:51.163457856 +0300
+++ etree.pyx	2005-06-18 10:20:18.919238336 +0300
@@ -980,8 +980,8 @@
     # XXX ignore parser for now
     cdef xmlDoc* c_doc
 
-    # XXX simplistic StringIO support
-    if isinstance(source, StringIO):
+    # XXX simplistic approach to support StringIO/cStringIO
+    if hasattr(source, 'getvalue'):
         c_doc = theParser.parseDoc(source.getvalue())
         return _elementTreeFactory(c_doc)