diff -ru dovecot-0.99.11/src/pop3/commands.c dovecot-0.99.12/src/pop3/commands.c
--- dovecot-0.99.11/src/pop3/commands.c	2004-07-13 13:58:28.000000000 +0300
+++ dovecot-0.99.12/src/pop3/commands.c	2004-11-12 16:56:13.000000000 +0200
@@ -407,17 +407,17 @@
 				continue;
 			}
 			client_send_line(client, message == 0 ?
-					 "%u %u.%u" : "+OK %u %u.%u",
-					 mail->seq, client->uidvalidity,
-					 mail->uid);
+					 "%u %08x%x" : "+OK %u %08x%x",
+					 mail->seq,
+					 mail->uid, client->uidvalidity);
 			found = TRUE;
 		}
 	} else {
 		while ((mail = client->mailbox->fetch_next(ctx)) != NULL) {
 			client_send_line(client, message == 0 ?
-					 "%u %u.%u" : "+OK %u %u.%u",
-					 mail->seq, client->uidvalidity,
-					 mail->uid);
+					 "%u %08x%x" : "+OK %u %08x%x",
+					 mail->seq,
+					 mail->uid, client->uidvalidity);
 			found = TRUE;
 		}
 	}