updated fluid example to not use floated sidebar and instead use position absolute; not ideal, but it works in most cases

docs/index.html

@@ -1115,6 +1115,7 @@
                 <span class="add-on">@</span>
                 <input class="medium" id="prependedInput" name="prependedInput" size="16" type="text" />
               </div>
+              <span class="help-block">Here's some help text</span>
             </div>
           </div><!-- /clearfix -->
           <div class="clearfix">