I am confused about your latest respond. As you mentioned before the problem you are experiencing is because of the W3 Total cache plugin and I gave the suggestion to remove the message from the Cornerstone.
I am not sure how the code you have mentioned in the latest reply is relevant to this question. Would you please kindly give detailed information?
If the problem is already solved then ignore this message, but if you have a problem other than W3 Total cache issue please open up a separate thread and give us detailed information about the case and we will be more than happy top help.