--- magentoerpconnect/unit/backend_adapter.py	2013-06-26 06:36:58 +0000
+++ magentoerpconnect/unit/backend_adapter.py	2013-11-18 08:05:44 +0000
@@ -126,6 +126,12 @@
             with magentolib.API(self.magento.location,
                                 self.magento.username,
                                 self.magento.password) as api:
+                
+                # If magento is used with PHP version >= 5.4, then we have to remove all
+                # trailing None values
+                if isinstance(arguments, list) and len(arguments) > 0 and arguments[-1] is None:
+                    arguments = [a for a in arguments if a is not None]
+                
                 result = api.call(method, arguments)
                 # Uncomment to record requests/responses in ``recorder``
                 # record(method, arguments, result)