My boss literally spends half an hour finger-fucking his phone on the mobile site to find "bugs", that I can't replicate. A combination like: swipe, pinch, landscape, portrait, back pinch, open new tab, close tab, ash cigarette on phone, dunk in toilet, dry, double tap... Aha I've found a bug, there's 0.5 pixel line of space between the bag header and the browser bar.