=== modified file 'devel.module'
--- devel.module	
+++ devel.module	
@@ -560,7 +560,7 @@
     setlocale(LC_NUMERIC, 'C');
     foreach ($queries as $value) {
       list($function, $query) = explode("\n", $value[0]);
-      $query = preg_replace(array("/'.*'/s", "/\d.*\.\d.*/", "/\d.*/"), array("S", "F", "D"), $query);
+      $query = preg_replace(array("/'.*?(?<!\\\\)'/s", "/\d+\.\d+/", "/\d+/"), array("S", "F", "D"), $query);
       $hash = md5($function . $query);
       if (!isset($qids[$hash])) {
         $qids[$hash] = db_result(devel_db_query("SELECT qid FROM {devel_queries} WHERE hash = '%s'", $hash));