What's the mystery of the Boostrap dropdown menu triangle?

niiqo

New Member
I'm trying to understand the difference between Twitter Bootstrap dropdown menus when they are included within a navbar and when they are not.When they are included into a navbar, a little up triangle/arrow is showed upon the expanded menu. This triangle is not showed when no navbar is used :http://twitter.github.com/bootstrap/javascript.html#dropdownsI just spent two hours exploring the css/html, I still don't understand WHY...Any idea ?
 
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