RooAbsData::Poisson)</tt> argument these
  approximate Poisson error bars are shown</li>
</ul>


<h4>Miscellaneous improvements other</h4>

<ul>
<li> The RooFit messagee service class <tt>RooMsgService</tt> has been augmented with a stack that
     can store its configurate state information. A call to <tt>saveState()</tt> will save the
     present configuration, which can be restored through a subsequent call to restoreState().<br/><br/></li>

<li> In addition to the method <tt>RooAbsArg::printCompactTree