<p dir="auto">When the example from the docs <a href="http://penguinwebdevelopment.com/bootstrap-3-docs/components.html#navbar-responsive" rel="nofollow">http://penguinwebdevelopment.com/bootstrap-3-docs/components.html#navbar-responsive</a> is collapsed (i.e. minimizing window width) to the size for phones (when the toggle collapse button appears). If the navbar contains dropdown menu buttons, clicking the dropdown buttons results in a normal dropdown popup vs. the collapse div expanding with more options below the button like in 2.3.2.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/47323a5ed2f125280af49a03816b860ede683a208c7f8cbc9367cf95a0e6e17e/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333634313033392f3831363130312f35363864663564632d656633392d313165322d386537652d3038383739636430303733382e706e67"><img src="https://camo.githubusercontent.com/47323a5ed2f125280af49a03816b860ede683a208c7f8cbc9367cf95a0e6e17e/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333634313033392f3831363130312f35363864663564632d656633392d313165322d386537652d3038383739636430303733382e706e67" alt="dropdown" data-canonical-src="https://f.cloud.github.com/assets/3641039/816101/568df5dc-ef39-11e2-8e7e-08879cd00738.png" style="max-width: 100%;"></a><br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/7b95e06af33d775afee14720d071d76cf27d9c125fc1ddb11022bcbd62e35fd5/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333634313033392f3831363130322f35386166666231632d656633392d313165322d383536332d6566356463316162346465632e706e67"><img src="https://camo.githubusercontent.com/7b95e06af33d775afee14720d071d76cf27d9c125fc1ddb11022bcbd62e35fd5/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333634313033392f3831363130322f35386166666231632d656633392d313165322d383536332d6566356463316162346465632e706e67" alt="dropdown2" data-canonical-src="https://f.cloud.github.com/assets/3641039/816102/58affb1c-ef39-11e2-8563-ef5dc1ab4dec.png" style="max-width: 100%;"></a></p>
<p dir="auto">Compare functionality to the collapse version of the responsive navbar from <a href="http://twitter.github.io/bootstrap/components.html#navbar" rel="nofollow">http://twitter.github.io/bootstrap/components.html#navbar</a></p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/6043ef5fc9f7966897be22b2b92bd00b8995be8bf81153f2a95b152537a95b58/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333634313033392f3831363130392f39633833323639382d656633392d313165322d393939352d3065326636623437383665322e706e67"><img src="https://camo.githubusercontent.com/6043ef5fc9f7966897be22b2b92bd00b8995be8bf81153f2a95b152537a95b58/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f333634313033392f3831363130392f39633833323639382d656633392d313165322d393939352d3065326636623437383665322e706e67" alt="bootstrap2 3 2" data-canonical-src="https://f.cloud.github.com/assets/3641039/816109/9c832698-ef39-11e2-9995-0e2f6b4786e2.png" style="max-width: 100%;"></a></p>
<p dir="auto"><a href="http://bootply.com/render/64786" rel="nofollow">http://bootply.com/render/64786</a></p>
<p dir="auto">When you collapse the navbar at the above example link then the bottom most dropdown sub-menu is hidden when clicked to view the dropdown. Tested on Google Chrome desktop and Ios Safari mobile.</p>