The defaultselectionlistbuilder was still expecting wd: (woody?) elements.
Doing a grep in src/blocks/forms/java/org/apache/cocoon/forms reveals a few more of these, summarized below. I can provide a patch for these as well if wanted :=)
./datatype/DefaultSelectionListBuilder.java ./datatype/DynamicSelectionList.java
./datatype/EnumSelectionList.java ./datatype/FlowJXPathSelectionListBuilder.java
./formmodel/Field.java
./formmodel/MultiValueField.java ./formmodel/RepeaterActionDefinitionBuilder.java
./formmodel/SubmitDefinitionBuilder.java
Fixed wd, wi references which I found in the files.
Vadim
