Item selection changes affected by expanding or collapsing items. Testing source from: http://docs.oracle.com/javafx/2/ui_controls/tree-view.htm#BABJGGGF.

1, Expand "IT Support"
2. Select "Mike Graham"
3. Expand "Sales Department".

You can see the focus is shifted to "Emma Jones", instead of the original "Mike Graham".

Sorry I cannot attach screen images to show the effect.

The problem is in MultipleSelectionModelBase class. See following comment for suggested fix marked by tony_lai.