I've installed this on several different shared servers. Those running PHP 5.2 throw up an error in domtemplate.php at line 390

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	//XML is already used for the internal representation; if outputting XML no filtering is needed
		if ($this->type == $this::XML) return $source;
%

Changing to this fixes it:

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	//XML is already used for the internal representation; if outputting XML no filtering is needed
		if ($this->type == $this->XML) return $source;
%