A quick and dirty fix for the macro problem, that may or may not work.

lib/python/Products/PageTemplates/TALES.py

@@ -260,6 +260,9 @@ class Context:
             default=default,
             target_language=target_language)
     
+    def getValue(self, name, default=None):
+        return self.vars.get(name, default)
+
 class TALESTracebackSupplement:
     """Implementation of ITracebackSupplement"""
     def __init__(self, context, expression):

lib/python/Products/PageTemplates/tests/testZopePageTemplate.py

@@ -71,7 +71,7 @@ class ZPTMacros(unittest.TestCase):
     This is in the slot
   </p>
 </metal:block>
-<tal:block condition="default">
+<tal:block condition="nothing">
 <div metal:define-macro="themacro">
   <h1>This is the header</h1>
   <p metal:define-slot="theslot">
@@ -80,14 +80,12 @@ class ZPTMacros(unittest.TestCase):
 </div>
 </tal:block>
 """
-        self.result = """
-<div>
+        self.result = """<div>
   <h1>This is the header</h1>
   <p>
     This is in the slot
   </p>
 </div>
-
 """       
 
     def testMacroExpansion(self):