ZK on iOS 8.0.2 with the standard Safari seems to be broken:

• try to load from the zk homesite Demos / ZK sandbox -> it never loads, processing stays forever

• same in ZK Live Demo / listbox / Paging. Here you have a JS error message "Failed to mount: setLabel not in superclass"

• same symptoms in our application, but we don't have a showcase on the Internet

As far as I could debug, the error is really deep inside the framework - the $supers is not working properly. Just to make things worse, but it could also be a clue about threads processing, if you set breakpoints and try to follow the execution, it works.