diff -up gnome-panel-2.22.1.2/applets/clock/system-timezone.c.timezone-debug gnome-panel-2.22.1.2/applets/clock/system-timezone.c
--- gnome-panel-2.22.1.2/applets/clock/system-timezone.c.timezone-debug	2008-04-22 20:17:15.000000000 -0400
+++ gnome-panel-2.22.1.2/applets/clock/system-timezone.c	2008-04-23 10:05:34.000000000 -0400
@@ -863,7 +863,7 @@ system_timezone_is_zone_file_valid (cons
                 return FALSE;
         }
 
-        if (read != 4 || strcmp (buffer, TZ_MAGIC) != 0) {
+        if (read != strlen (TZ_MAGIC) || strncmp (buffer, TZ_MAGIC, strlen (TZ_MAGIC)) != 0) {
                 g_set_error (error, SYSTEM_TIMEZONE_ERROR,
                              SYSTEM_TIMEZONE_ERROR_INVALID_TIMEZONE_FILE,
                              "%s is not a timezone file",