You will have to take a look at the code where the XML gets generated. I've solved similar problems with some datatypes. For a little article about how I did that, see http://blog.coomanskristof.be/2005/12/23/enhancedselection-fix-for-php-44/.
Try out the following modifications, I think it should work then with PHP 4.4.x (eZ publish 3.7.x):
In <i>modules/survey/classes/ezsurveymultiplechoice.php</i>, replace the method encodeXMLOptions of the eZSurveyMultipleChoice class with the following code: