TB 4.0 crashing (probably JS)

hoping this is reproducible for someone else:

using Tor Browser 4.0 on Windows 7, SP1 to access oboom.com (e.g. http://www.oboom.com/QS2KHQ77/) whitelisted in NoScript 2.6.9.1 but with NoScript global blocking on

after the "sign up for premium" "shade" would normally be dismissed (with the [Esc] key), in the Tor Browser 3.x series, the 4.0 browser hard crashes, instead