How to reproduce the bug: On iOS 8.1 enter http://greenti.cl/test.html with safari in iOS 8, save it to home screen. Enter via icon in homescreen, mess around with any of the selects. It Crashes
The real problem is occurring on a web app with meta "apple-mobile-web-app-capable", when launching the app from the home screen the browser interface isn't showed (normal behaviour). Clicking around a few times the select and the screen makes safari crash. This doesn't happen inside a normal safari window (only fullscreen windows made it crash).
Probably I should post something on safari for iOs developers forum, but I cant find where is that.