A form containing a TWebCheckListBox fails when handling showModal callback. All items returns false when trying to get checked state.... When debugging, it seems that the listbox component does not find its own sub checkbox subcomponent, like this:
If I make my own callback handling when clicking a button to close the modal dialog form, and not using the callback passed as parameter to ShowModal, then it works fine. Other components than TWebCheckListbox seems to work fine both ways.