Try this workaround to solve problem with TextSearchExpanded.
(I'm sorry for the $this->lang['xxx'] coding, please replace them with the original content...)

%%(php)<?php 
 $etc = "<span class='textsearch_etc'>...</span>";
 $output = $this->FormOpen("", "", "get");
 $output .= '
 <table border="0" cellspacing="0" cellpadding="0">
 <tr><td>'.$this->lang['search_for'].':&nbsp;</td>
<td><input name="phrase" size="40" value="';
 if (isset($_REQUEST["phrase"])) 
 {
  $output .= $this->htmlspecialchars_ent(stripslashes($_REQUEST["phrase"]));
 }
 $output .= '" /> <input type="submit" value="'.$this->lang['search'].'"/></td></tr>
</table>';
 $output .= $this->FormClose();
 
 if (isset($_REQUEST["phrase"]) && $phrase = $_REQUEST["phrase"])
 {
 	$phrase = stripslashes($phrase); 
 	$output .= "<br />";
 	$results = $this->FullTextSearch($phrase);

  switch (count($results))
  {
   case 0: $output .= sprintf($this->lang['zero_result_for'], $phrase); break;
   case 1: $output .= sprintf($this->lang['one_result_for'], $phrase); break;
   default: $output .= sprintf($this->lang['n_results_for'], $phrase, count($results)); break;
  }
  $phrase = str_replace("\"", "", $phrase);
  if ($results)
  {
   $output .= "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">";
   $STORE_FORMATING_AS_TEXT = 1;
   #preg_quote
   $phrase = preg_replace('/(\.|\\|\?|\[|\^|\]|\$|\(|\)\|{\|\}|\=|\!|\<|\>|\||\:|\/)/', "\\\\$1", $phrase);
   $phrase = preg_replace('/\-\S*|\s\+/', ' ', " $phrase ");
   $phrase = preg_replace(array('/^ +| +$/', '/ \*/', '/\*\w*/', '/ +/'), array('', '', '$1\S*', '|'), $phrase);
   foreach ($results as $i => $page)
   {
	preg_match_all("/(.{0,120})($phrase)(.{0,120})/is",$page['body'],$matchString);
	$text = $this->htmlspecialchars_ent(implode('<br />',$matchString[0]));
	$text = str_replace('&lt;br /&gt;', "$etc<br />$etc", $text);
	//   include("formatters/wakka.php");
	$highlightMatch = preg_replace("/($phrase)/i","<span class='textsearch_keywords'>$1</span>",$text,-1);
	$matchText = "$etc$highlightMatch$etc";
	$output .= "<tr>
 <td valign=\"top\" align=\"right\">
 <table>
  <tr>
   <td valign=\"top\" align=\"left\" bgcolor=\"#DDDDDD\">
	<font color=\"white\" size=\"-3\">
	".($i+1)."
	</font>
   </td>
  </tr>
 </table>
 </td>
 <!-- link -->
 <td valign=\"top\">
 ".$this->Link($page["tag"])."
 </td>
 <!-- date of last update -->
 <td valign=\"top\" align=\"right\">
  <font color=\"gray\" size=\"-3\">
  $page[time]
  </font>
 </td>
 </tr>
 <tr>
 <td>
  &nbsp;
 </td>
 <td colspan=\"2\">
  $matchText
 </td>
 </tr>
 <tr>
 <td>
  &nbsp;
 </td>
 </tr>
 ";
  }
  $output .= "</table>";
 }
}
$output = $this->ReturnSafeHtml($output);
echo $output;
?>%%

Every action in Wikka should use the coding :
%%(php)$output = "....";
...
$output .= ".....";
...
print($this->ReturnSafeHtml($output));%%
To prevent javascript attack, but this is another problem.
~&Actually, SafeHTML is needed only for those "parts" of an action where user input **directly** results in HTML output (such as an action parameter //used as// a tag attribute). When HTML is completely **generated** by an action, it's not needed (Wikka should take care by itself that //generated// code is "safe"). --JavaWoman

--DotMG

----
As part of the SemanticMarkup drive, why not replace //all// that tag-soup table with:

%%(php)
$highlightMatch = preg_replace("/($phrase)/i","<em><em>$1</em></em>",$text,-1);
$matchText = "&#8230;".$highlightMatch."&#8230;";
$output .= "\n<p>".($i+1)." ".$this->Link($page["tag"])." &mdash; ".$page[time]."</p>";
$output .= "\n<blockquote>".$matchText."</blockquote>\n";%%

You remove all the unnecessary table and presentational spans. Use CSS to present the double emphasis exactly how you want, that is what CSS is there for. --IanAndolina