If you have a listbox like:

<listbox id="articleListbox" checkmark="true" mold="paging" pageSize="20"
model="@load(vm.articleList)" selectedItem="@bind(vm.selectedArticle)"
onSelect="vm.onSelectArticleListbox()">

and in the viewmodel you've got a method

@NotifyChange("*")
public void onSelectArticleListbox() {
try

{ checkValidation(rootWindow); } catch (WrongValuesException e){ selectedArticle = prevSelectedArticle; throw e; } finally { prevSelectedArticle = selectedArticle; }
}

zk will not notice that the selectedItem of the listbox just changed again.
if you change the method to directly reload the component it works:

public void onSelectArticleListbox() {
try{ checkValidation(rootWindow); }

catch (WrongValuesException e)

{ selectedArticle = prevSelectedArticle; getDataBinder().loadComponent(articleListbox, false); throw e; }

finally

{ prevSelectedArticle = selectedArticle; }

}