On my machine, TestSelectWindow is passing in non-PI mode and failing in PI mode. Bizarrely, it's trying to click on popupPage, but nothing is happening, and eventually waitForPopup correctly times out. Initially, due to the timeout in waitForPopup, I'd expected this was due to changes in the waitForPopup logic, but waitForPopup appears to be working correctly; it's the button that's not working. (Why would that be...?)