--- devel_themer.module	2009-10-08 19:01:56.000000000 +0000
+++ devel_themer_nl2br.module	2009-10-08 19:01:48.000000000 +0000
@@ -504,7 +504,7 @@ function devel_themer_exit() {
 
 function devel_theme_call_marker($name, $counter, $type) {
   $id = "thmr_". $counter;
-  return array("<span id=\"$id\" class=\"thmr_call\">", "</span>\n");
+  return nl2br("<span id=\"$id\" class=\"thmr_call\">", "</span>\n");
 }
 
 // just hand out next counter, or return current value