From the help chatroom:
Michpem: hey guys, I really need help, for some reason the teambuilder button crashes my browser since yesterday
Michpem: I found that clearing the cookies (i.e. deleting my teams) works, but when I add a new one, it starts crashing again
Michpem: has anything changed on how teams are stored or something? I'm using Opera Next/Beta 44
It was working just fine two days ago, and now it's just crashing every time. It's working fine on Firefox, however. Still, Opera is my main browser, so it would be awesome if you guys could investigate this.