diff --git a/HISTORY.md b/HISTORY.md
index 56f4d796..2258f38c 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -15,6 +15,8 @@ http://visjs.org
 - Made global color options for edges overrule the inheritColors.
 - Improved cleaning up of the physics configuration on destroy and in options.
 - Made nodes who lost their group revert back to default color.
+- Changed group behaviour, groups now extend the options, not replace. This allows partial defines of color.
+- Fixed bug where box shaped nodes did not use hover color.
 
 ### Graph2d
 
diff --git a/examples/network/06_groups.html b/examples/network/06_groups.html
index 605755ba..19964045 100644
--- a/examples/network/06_groups.html
+++ b/examples/network/06_groups.html
@@ -148,9 +148,6 @@
       network = new vis.Network(container, data, options);
     }
 
-    function dostuff() {
-      nodesData.update({id:16,group:null})
-    }
   </script>
 </head>
 
@@ -163,7 +160,6 @@
   <input type="submit" value="Go">
 </form>
 <br>
-<input type="button" onclick="dostuff()">
 <div id="mynetwork"></div>
 
 </body>