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many portions of code in XOOPS core have invalid code xhtml, by example, in file class/xoopstree.php line 195 is:
$path = "<a href='".$funcURL."&".$this->id."=".$sel_id."'>".$name."</a> : ".$path."";
but the correct way to do is:
$path = "<a href='".$funcURL."&amp;".$this->id."=".$sel_id."'>".$name."</a> : ".$path."";
Note that ampersands in URL must be
&please read it:
http://www.htmlhelp.com/tools/validator/problems.html#ampI hope that development team consider this recomendation.
