This is a bug, and I have no idea how it happened--it is actually in the programming code now to display "cat" as the default response for open ended items. All I can think of is that when running through the "open ended responses" sample, I answered "cat" while doing some testing. Somehow, that text landed in the programming code between the two empty quotes used to define the default response for the open ended questions. As improbable/impossible as that seems to me, it becomes even more unlikely when combined with that 223 code. I will fix this today. It will be resolved in versions from 2006.2.19 onward.
-Blair