[xwiki-devs] How to get multiple values from object property.

Hello, I have a XWiki object of a class where one property is defined as a list. During the page creation of this object (by using appropriate template provider) I'm setting several values from the list of possible values for the property. My problem is that although I've set several values I still get just one value when I look at the object properties in appropriate sheet class. E.g. I do have BookClass which besides other props defines property `kind' where kind might have `fantasy', `drama', or `novel' value. It also might have several values -- well, not good example but I hope this illustrates what I'm doing here. And now when I create new page as a book I set several kinds (for example fantasy & drama) then when I see the page I see only fantasy as the book kind. I'm using XWiki 3.1 snapshot as of May 27 2011. My question is it a known bug, am I doing anything wrong or was it already fixed (in case of bug)? Thanks a lot! Karel