尝试在标记模式（不是简单标记）中使用角度ui-select2，丢失对象

I've recently upgraded from angular 1.1.4 up to 1.2.9, and grabbed the latest ui-select2 directive and the latest select2 component. My select2s in tag mode have stopped working. The options list and typeahead work, but when I select anything from it, the new tag shows up as a blank thing with no value, and debugging it, I see it is getting sliced from {text: "foo", id: 10} just down to 10 - the object is being replaced with the id. I'd really appreciate any insight on why this is happening. I've recently upgraded from angular 1.1.4 up to