Open the following HTML snippet in IE (6 or 7) as HTML document. Ctrl+F and look for "test". IE never finds if the search term "test" which happens to be in the hidden textarea.
<html>
<body>
<table>
<tr>
<td style="display:none;">
<textarea >test</textarea> -- first hidden 'test' is here
</td>
</tr>
</table>
test -- Second 'test' is here
</body>
</html>
am I missing something trivial here?