H R Block Faces Fraud Over Enron Bonds  NEW YORK (Reuters) - H R Block Inc.'s &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=HRB.N target=/stocks/quickinfo/fullquote"&gt;HRB.N&lt;/A&gt; financial  advisors unit on Monday was charged with fraud by securities  regulators for misrepresenting the risks of Enron Corp.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ENRNQ.PK target=/stocks/quickinfo/fullquote"&gt;ENRNQ.PK&lt;/A&gt; bonds and calling them safe, even as the energy  trader had begun its collapse into bankruptcy.