only in patch2:
unchanged:
--- a/includes/install.inc
+++ b/includes/install.inc
@@ -1177,6 +1177,10 @@ function drupal_check_profile($profile) {
     throw new Exception(install_no_profile_error());
   }
 
+  // Prime the cache to find our profile file.
+  // This is the same record as inserted into the system table after install.
+  drupal_get_filename('module', $profile, "profiles/$profile/$profile.profile");
+
   $info = install_profile_info($profile);
 
   // Collect requirement testing results.