Saks Slips Into Loss in Third Quarter  NEW YORK (Reuters) - Department store operator Saks Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=SKS.N target=/stocks/quickinfo/fullquote"&gt;SKS.N&lt;/A&gt; on Tuesday posted a surprise loss for its third  quarter, hurt by hurricanes in the southeastern U.S. and  charges for the closure of some stores.