Steps
1. Create a dummy test database using a fresh install of Drupal 6.16 and the latest versions of CCK and this module.
2. Create a content type and add a couple of fields.
3. Enter some test data, in number exceeding the Maximum Response Size as can be set in the configuration of this module.
4. Test your repository at http://re.cs.uct.ac.za/

Bugs:
Test 2:
[Error] re.Wx710i:7:23: cvc-complex-type.3.2.2: Attribute 'test' is not allowed to appear in element 'request'.
[Error] re.Wx710i:18:28: cvc-complex-type.2.4.d: Invalid content was found starting with element 'error'. No child element is expected at this point.

Test 6:
[Error] re.A1btiZ:89:92: cvc-datatype-valid.1.2.1: '' is not a valid value for 'integer'.
[Error] re.A1btiZ:89:92: cvc-attribute.3: The value '' of attribute 'cursor' on element 'resumptionToken' is not valid with respect to its type, 'nonNegativeInteger'.

** This bug has been filed separately as a critical bug, the solution is very simple **

Test 11:
------ Response from Xerces Schema Validation ------
[Error] re.EKA6np:7:107: cvc-datatype-valid.1.2.3: 'some_random_date' is not a valid value of union type 'UTCdatetimeType'.
[Error] re.EKA6np:7:107: cvc-attribute.3: The value 'some_random_date' of attribute 'from' on element 'request' is not valid with respect to its type, 'UTCdatetimeType'.
[Error] re.EKA6np:7:107: cvc-datatype-valid.1.2.3: 'some_random_date' is not a valid value of union type 'UTCdatetimeType'.
[Error] re.EKA6np:7:107: cvc-attribute.3: The value 'some_random_date' of attribute 'until' on element 'request' is not valid with respect to its type, 'UTCdatetimeType'.

The same errors are reported for several other tests.