Weak Ice Cream Sales Melt Nestle's Profit  ZURICH (Reuters) - Higher raw material costs and lower ice  cream sales in Europe ate into Nestle's &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=NESN.VX target=/stocks/quickinfo/fullquote"&gt;NESN.VX&lt;/A&gt; first-half  results, sending shares in the world's largest food group down  over five percent on Wednesday amid concerns about its  long-term profitability.