watir/watir-webdriver — pull request #271 by titusfortner (2014-09-16 00:23:12+00:00)
Title: Fixes issue with stale elements

We're intermittently getting this Selenium error when we check for the existence of an element that has gone stale. Expected behavior would be to return a false since the element does not actually exist.

This fix will raise the UnknownObjectException which is rescued to return false in the #exists? method.