? drushrc.php
Index: commands/pm/pm.drush.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/drush/commands/pm/pm.drush.inc,v
retrieving revision 1.16
diff -u -p -r1.16 pm.drush.inc
--- commands/pm/pm.drush.inc	14 Apr 2009 21:30:29 -0000	1.16
+++ commands/pm/pm.drush.inc	14 Apr 2009 22:26:51 -0000
@@ -513,16 +513,16 @@ function pm_dl_destination($type) {
   
   $drupal_root = drush_get_context('DRUSH_DRUPAL_ROOT');
   $site_root = drush_get_context('DRUSH_DRUPAL_SITE_ROOT', false); 
+  $site_not_specified = is_null(drush_get_option('l'));
 
   // If a URI is provided and we bootstrapped successfully then we install to
   // that specific site, otherwise we install to sites/all/modules
-  if ($site_root) {
+  if ($site_root && !$site_not_specified) {
     $sitepath = $drupal_root .'/'. $site_root .'/';
   }
   else if ($drupal_root) {
     $sitepath = $drupal_root . '/sites/all/';
   }