diff -ur gnome-screensaver-2.22.2/src/setuid.c gnome-screensaver-2.22.2.new/src/setuid.c
--- gnome-screensaver-2.22.2/src/setuid.c	2008-04-02 19:47:21 +0400
+++ gnome-screensaver-2.22.2.new/src/setuid.c	2008-07-10 18:53:59 +0400
@@ -75,14 +75,14 @@
 
          errno = 0;
          if (setgroups (1, &gid) < 0)
-                 sgs_errno = errno ? errno : -1;
+                /* sgs_errno = errno ? errno : -1*/;
 
         errno = 0;
-        if (setgid (gid) != 0)
+        if (setresgid (gid, gid, gid) != 0)
                 gid_errno = errno ? errno : -1;
 
         errno = 0;
-        if (setuid (uid) != 0)
+        if (setresuid (uid, uid, uid) != 0)
                 uid_errno = errno ? errno : -1;
 
         if (uid_errno == 0 && gid_errno == 0 && sgs_errno == 0) {
@@ -195,7 +195,7 @@
                 }
 
                 if (uid != euid || gid != egid) {
-                        if (! set_ids_by_number (uid, gid, uid_message)) {
+                        if (! set_ids_by_number (euid == 0 ? uid : euid, egid == 0 ? gid : egid, uid_message)) {
                                 reason = g_strdup ("unable to discard privileges.");
 
                                 ret = FALSE;