Crash at MLB.com

[Yosuke Arai]

Well, I wanted to watch some video clips of MLB Championship Series 
games at MLB.com. You know, some clips you can watch free of charge; 
others require a registration. And I've noticed that with 100% 
reproducibility OW 5.1b2 crashes when closing the small log-in window. 
However, closing that window with a video/audio clip inside won't cause 
any crash and the window is safely closed. I haven't experienced this 
with 5.0.x or 5.1b1. Any thoughts?

Y.Arai