Fixed #267.

css/bootstrap-multiselect.css

-.multiselect-container{position:absolute;list-style-type:none;margin:0;padding:0}.multiselect-container .input-group{margin:5px}.multiselect-container>li{padding:0}.multiselect-container>li>a.multiselect-all label{font-weight:700}.multiselect-container>li>label.multiselect-group{margin:0;padding:3px 20px;height:100%;font-weight:700}.multiselect-container>li>a>label{margin:0;height:100%;cursor:pointer;font-weight:400}.multiselect-container>li>a>label.radio,.multiselect-container>li>a>label.checkbox{margin:0}.multiselect-container>li>a>label>input[type=checkbox]{margin-bottom:5px}.btn-group>.btn-group:nth-child(2)>.multiselect.btn{border-top-left-radius:4px;border-bottom-left-radius:4px}
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+.multiselect-container{position:absolute;list-style-type:none;margin:0;padding:0}.multiselect-container .input-group{margin:5px}.multiselect-container>li{padding:0}.multiselect-container>li>a.multiselect-all label{font-weight:700}.multiselect-container>li>label.multiselect-group{margin:0;padding:3px 20px;height:100%;font-weight:700}.multiselect-container>li>a{padding:0}.multiselect-container>li>a>label{margin:0;height:100%;cursor:pointer;font-weight:400;padding:3px 20px 3px 40px}.multiselect-container>li>a>label.radio,.multiselect-container>li>a>label.checkbox{margin:0}.multiselect-container>li>a>label>input[type=checkbox]{margin-bottom:5px}.btn-group>.btn-group:nth-child(2)>.multiselect.btn{border-top-left-radius:4px;border-bottom-left-radius:4px}
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less/bootstrap-multiselect.less

@@ -31,12 +31,14 @@
     }
 
     > a {
+      padding: 0;
 
       > label {
         margin: 0;
         height: 100%;
         cursor: pointer;
         font-weight: normal;
+        padding: 3px 20px 3px 40px;
 
         &.radio, &.checkbox {
           margin: 0;