Strange page bug on firefox

Question

I\'m using Choosen and Twitter Bootstrap in my project. Here is jsfiddle

http://jsfiddle.net/Wexcode/7HLyZ/3/

Try to open this jsFiddle on 2 browsers: Firefox an

Answer 1

Check out this: http://jsfiddle.net/7HLyZ/35/

Changes:

.collapse.in {height: auto;}

Collapsible Group Item #1

Collapsible Group Item #2