If you click the Help-link in a manage_propertiesForm screen (point begin to bring up the Help for the properties) and have a look down where it says in bold "Note:", followed by this strange line of text: [...] This property (or method) should return a list of strings will be used to provide choices for the selection. Well, that cleared it up, didn't it? :). (Prolly missing a "that"?) Another thing, which might be a bug or a feature. I used to do REQUEST.form.keys() to list all attributes in the REQUEST. With 2.3.1b1 that doesn't seem to work, because the attributes are in REQUEST.other. (This is when posting from a form.) The words REQUEST and RESPONSE are also in other, so when I want to do stuff with it I need to make sure I don't include those in the REQUEST which I'm shipping off (because then they would only be strings, not instances, to the next method).