<p dir="auto">The tooltip was added El to next it's owner and effect to CSS like .btn-group &gt; .btn:last-child</p>
<p dir="auto">&lt;div class="btn-group"&gt;<br>
&lt;button class="btn"&gt;<br>
&lt;button class="btn"&gt; &lt;= this is last-child<br>
&lt;/div&gt;</p>
<p dir="auto">[Bug] When tooltip (on hover tooltip created)<br>
&lt;div class="btn-group"&gt;<br>
&lt;button class="btn"&gt;<br>
&lt;button class="btn"&gt; &lt;= this is not last-child (.btn-group &gt; .btn:last-child don't work)<br>
&lt;div class="tooltip"&gt; &lt;= tooltip is last-chid<br>
&lt;/div&gt;</p>
<p dir="auto"><a href="http://jsfiddle.net/JEBdk/5/" rel="nofollow">http://jsfiddle.net/JEBdk/5/</a></p>
<p dir="auto">tooltip or popover on btn-group. the btn-group is not display correctly!<br>
the last btn have not round corners and between the btn's is a space.</p>
<p dir="auto">my suggestion, by generating the tip or popover on the end of document .</p>