Applied patch provided by ticket #788 in 0.9, 0.10 and trunk

lib/Doctrine/Query.php

@@ -1062,6 +1062,7 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable, Seria
             $this->_queryComponents = array();
             $this->_pendingAggregates = array();
             $this->_aggregateAliasMap = array();
+            $this->_enumParams = array();
         }
         $this->reset();
 
@@ -1077,7 +1078,6 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable, Seria
 
         $params = $this->convertEnums($params);
 
-
         // Proceed with the generated SQL
 
         if (empty($this->_sqlParts['from'])) {