Krispy Kreme COO Leaves for New Job  CHICAGO (Reuters) - Krispy Kreme Doughnuts Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=KKD.N target=/stocks/quickinfo/fullquote"&gt;KKD.N&lt;/A&gt;  said on Monday that its chief operating officer is leaving the  company for another job, the latest setback for a company that  is trying to recover from sluggish sales and an accounting  probe.