http://zkfiddle.org/sample/b9isjp/8-Selection-Error-on-Listbox-with-Paging

1. Select an item on page 1
2. Switch to page 2 and shift-select an item
   Here we see the first error, the items inbetween are not selected correctly
3. Switch back to page one -> ArrayIndexOutOfBoundsException (this does not occur in ZK 6 apparently)

java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.ArrayList.get(ArrayList.java:324)
at org.zkoss.zul.ListModelList.getElementAt(ListModelList.java:142)
at org.zkoss.zul.Listbox.service(Listbox.java:3385)
at org.zkoss.zk.ui.impl.DesktopImpl.service(DesktopImpl.java:691)
at org.zkoss.zk.ui.impl.UiEngineImpl.execUpdate(UiEngineImpl.java:1123)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:562)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:457)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:465)
...