When submitting the chart I catch the $_POST (strXML), but the output XML isn't correct:

<connector strength='0.5' from='1' to='2' alpha='100' name='startdate < enddate' color='EAC5C5' arrowAtStart='0' arrowAtEnd='1' />

As you can see the &lt; is changed in '<'. This causes an invalid XML. How can this be solved, or is it a bug?

Thanks in advance