Avon Lowers U.S. Sales Forecast  CHICAGO (Reuters) - Avon Products Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=AVP.N target=/stocks/quickinfo/fullquote"&gt;AVP.N&lt;/A&gt; on Friday  posted a 33 percent increase in third-quarter profit, but  continued concerns over weakness in the United states pushed  the stock 7 percent lower.