I've been noticing since the last update that, when I switch from the app to Safari, Safari "blacks out" for a second becoming coming back on.
This was happening probably every other time.
This morning, with the app open, Safari stayed dark - pitch black, to be exact. There was no way to get it to show anything.
on Watchprosite.com the address window just said "App view available" or something like that, then the URL.
Safari never worked again after that, showing black screen even for yahoo.com or network54.
It all went back to normal only after I closed the app.