Ford Posts Profit, Autos Disappoint Again  DETROIT (Reuters) - Ford Motor Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=F.N target=/stocks/quickinfo/fullquote"&gt;F.N&lt;/A&gt; reported a  stronger-than-expected quarterly profit on Tuesday, but losses  widened in its core automotive business and the company's  shares sagged after it said U.S. regulators were looking into  its pension accounting practices.