diff -r -u samba-3.0.11/source/smbd/posix_acls.c samba-3.0.11-orphan_sid/source/smbd/posix_acls.c
--- samba-3.0.11/source/smbd/posix_acls.c	2004-11-15 22:03:13.000000000 -0500
+++ samba-3.0.11-orphan_sid/source/smbd/posix_acls.c	2004-12-09 16:42:17.000000000 -0500
@@ -1379,6 +1379,12 @@
 		} else if (NT_STATUS_IS_OK(sid_to_gid( &current_ace->trustee, &current_ace->unix_ug.gid))) {
 			current_ace->owner_type = GID_ACE;
 			current_ace->type = SMB_ACL_GROUP;
+		} else if (lp_force_unknown_acl_user(SNUM(fsp->conn))) {
+			DEBUG(3,("Must by an orphan/foreign SID- mapping SID to samba's UID\n"));
+			extern struct current_user current_user;
+			current_ace->unix_ug.uid = current_user.uid;
+			current_ace->owner_type = UID_ACE;
+			current_ace->type = SMB_ACL_USER;
 		} else {
 			fstring str;