> When we launched, the number of people completing the form doubled. The analytics people didn’t even know where these users were coming from. Of course, your javascript-based analytics package doesn’t see the users you are bouncing because of javascript failures.

Yeah, reminds me of the b52 story re holes in wings on the planes that made it back from missions, leading them down the wrong path of strengthening wings. They weren't looking at the planes that never came back with holes in the fuel silages.