Index: t3lib/class.t3lib_sqlparser.php
===================================================================
--- t3lib/class.t3lib_sqlparser.php	(revision 6889)
+++ t3lib/class.t3lib_sqlparser.php	(working copy)
@@ -761,7 +761,7 @@
 					} else {
 						$stack[$pnt]['distinct'] = $this->nextPart($parseString,'^(distinct[[:space:]]+)');
 							// Otherwise, look for regular fieldname:
-						if ($fieldName = $this->nextPart($parseString,'^([[:alnum:]\*._]+)(,|[[:space:]]+)'))	{
+						if (($fieldName = $this->nextPart($parseString, '^([[:alnum:]\*._]+)(,|[[:space:]]+)')) !== '') {
 							$stack[$pnt]['type'] = 'field';
 	
 								// Explode fieldname into field and table: