Index: devel.drush.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/devel/devel.drush.inc,v
retrieving revision 1.9
diff -u -p -r1.9 devel.drush.inc
--- devel.drush.inc	27 Dec 2010 18:14:24 -0000	1.9
+++ devel.drush.inc	15 Feb 2011 16:50:31 -0000
@@ -93,7 +93,7 @@ function drush_devel_download() {
   else {
     $path = drush_get_context('DRUSH_DRUPAL_ROOT');
     if (module_exists('libraries')) {
-      $path .= libraries_get_path('FirePHPCore') . '/FirePHPCore';
+      $path .= '/' . libraries_get_path('FirePHPCore') . '/FirePHPCore';
     }
     else {
       $path .= '/'. drupal_get_path('module', 'devel') . '/FirePHPCore';