Listbox getSelectedItems returns _roSelItems instead of _selItems. Every modification of selected items are done with _selItems. _roSelItems does not reflect the changes of _selItems. Tested condition was when checkmark = "true" and multiple = "true".

/** A list of selected items. */
private transient Set<Listitem> _selItems;
/** A readonly copy of

. */
private transient Set<Listitem> _roSelItems;

under init()

_selItems = new LinkedHashSet<Listitem>(4);
_roSelItems = Collections.unmodifiableSet(_selItems);

/**

• Returns all selected items.
  *
• <p>
• Note: if live data is used ( {@link #getModel}

  is not null), the returned

• item might NOT be loaded yet. To ensure it is loaded, you have to invoke
• {@link #renderItem}

  .
  */
  public Set<Listitem> getSelectedItems()

  { return _roSelItems; }