entitycache_array_flip.patch

--- entitycache.module	2011-10-27 15:45:19.000000000 +0100
+++ entitycache.module	2011-10-27 15:31:32.000000000 +0100
@@ -61,6 +61,7 @@
     // were passed. The $ids array is reduced as items are loaded from cache,
     // and we need to know if it's empty for this reason to avoid querying the
     // database when all requested entities are loaded from cache.
+    $ids = is_array($ids) ? array_filter($ids, array(__CLASS__, '_check_ids')) : FALSE;
     $passed_ids = !empty($ids) ? array_flip($ids) : FALSE;
     // Try to load entities from the static cache, if the entity type supports
     // static caching.
@@ -172,6 +173,13 @@
       $function($entities);
     }
   }
+  
+  /**
+   * Helper to filter non string & non integer ids
+   */
+  public static function _check_ids($id) {
+    return (is_string($id) || is_int($id));
+  }
 }
 
 /**