Try going into The Bootstrap theme settings (Left menu –> Twitter Bootstrap –> “Bootstrap CSS”) and unchecking the option “Include ALL Bootstrap Javascript libraries”. This worked for me. Explanation below:
We had problems with the dropdown menu item(s) not wanting to expand. The symptoms were exactly as described in this thread: https://stackoverflow.com/questions/11813304/the-bootstrap-dropdown-open-toggle-does-not-work-properly-in-development-but
To sum it up: When clicking the menu item, the dropdown menu item quickly assumed the class “open”, but then instantly reverted to the previous non-open state. The word ‘open’ just flickered by in the webkit inspector. As was pointed out in the SO thread above, this has to do with the same javascript being loaded/called more than once. Unchecking the “All JavaScript libraries” option got rid of this line in the page source: <script type=’text/javascript’ src=’//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.2.2/bootstrap.min.js?ver=2.2.2.b’></script>
…while keeping this file: “bootstrap.min.js?ver=2.0.3”. Now it works.