Able to query table under-going an RSU while node is desyned from Cluster

As per the Percona FAQ:
http://www.percona.com/doc/percona-xtradb-cluster/faq.html#q-how-can-i-check-the-galera-node-health
“Unknown error (node is online but Galera is not connected/synced with the cluster)”

1) Wsrep_OSU_method=RSU on node1/2/3

2) Node1/2/3: mysql –u root –p –e’show create table t1’
+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| t1 | CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `hostname` varchar(64) NOT NULL,
  `port` int(11) NOT NULL,
  `instime` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=51875647 DEFAULT CHARSET=latin1 |
+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

3) Beginning row counts of t1 on all three nodes:
+----------+----------------------------+---------------------+
| count(*) | @@hostname | now() |
+----------+----------------------------+---------------------+
| 17291893 | Node1 | 2012-03-26 10:45:31 |
+----------+----------------------------+---------------------+
+----------+----------------------------+---------------------+
| count(*) | @@hostname | now() |
+----------+----------------------------+---------------------+
| 17291893 | node2 | 2012-03-26 10:45:32 |
+---------+----------+----------------------------+---------------------+
+---------+----------+----------------------------+---------------------+
 | count(*) | @@hostname | now() |
+---------+----------+----------------------------+---------------------+
| 17291893 | node3 | 2012-03-26 10:45:31 |
+---------+----------+----------------------------+---------------------+

4) Add a column to table t1 on node1:

mysql> select now();
+---------------------+
| now() |
+---------------------+
| 2012-03-26 10:46:15 |
+---------------------+
1 row in set (0.00 sec)

mysql> ALTER TABLE repl.t1 add column10 int;
Query OK, 17291893 rows affected (2 min 55.97 sec)
Records: 17291893 Duplicates: 0 Warnings: 0

mysql> select now();
+---------------------+
| now() |
+---------------------+
| 2012-03-26 10:49:11 |
+---------------------+
1 row in set (0.00 sec)

5) Login to node1 - able to select a row from the table under-going RSU (node1) - was expecting to get an "Unknown Command" message based on the FAQ linked above.

mysql> select *,now() from t1 where port=9999; 
+----------+----------+------+---------------------+---------------------+
| id | hostname | port | instime | now() |
+----------+----------+------+---------------------+---------------------+
| 51875649 | RSU-test | 9999 | 2012-03-26 10:44:19 | 2012-03-26 10:46:57 |
+----------+----------+------+---------------------+---------------------+
1 row in set (7.04 sec)

6) Log messages from all three nodes:

[root@node1]# cat node1.err
120326 10:46:15 [Note] WSREP: Node 1 (node1) desyncs itself from group
120326 10:46:15 [Note] WSREP: Shifting SYNCED -> DONOR/DESYNCED (TO: 28807712)
120326 10:46:15 [Note] WSREP: Provider paused at ea8d8c3e-5bba-11e1-0800-0bdfe5c74f3a:28807712
120326 10:49:11 [Note] WSREP: Provider resumed.
120326 10:49:11 [Note] WSREP: Node 1 (node1) resyncs itself to group
120326 10:49:11 [Note] WSREP: Shifting DONOR/DESYNCED -> JOINED (TO: 28807712)
120326 10:49:11 [Note] WSREP: Member 1 (node1) synced with group.
120326 10:49:11 [Note] WSREP: Shifting JOINED -> SYNCED (TO: 28807712)
120326 10:49:11 [Note] WSREP: Synchronized with group, ready for connections

[root@node2]# cat node2.err
120326 10:46:16 [Note] WSREP: Node 1 (node1) desyncs itself from group
120326 10:49:12 [Note] WSREP: Node 1 (node1) resyncs itself to group
120326 10:49:12 [Note] WSREP: Member 1 (node1) synced with group.

[root@node3]# cat node3.err
120326 10:46:14 [Note] WSREP: Node 1 (node1) desyncs itself from group
120326 10:49:10 [Note] WSREP: Node 1 (node1) resyncs itself to group
120326 10:49:10 [Note] WSREP: Member 1 (node1) synced with group.

7) show create table t1

node1 (node that underwent RSU):
CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `hostname` varchar(64) NOT NULL,
  `port` int(11) NOT NULL,
  `instime` datetime NOT NULL,
  `column10` int(11) DEFAULT NULL,  New column has been added.
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=51875652 DEFAULT CHARSET=latin1

node2
CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `hostname` varchar(64) NOT NULL,
  `port` int(11) NOT NULL,
  `instime` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=51875650 DEFAULT CHARSET=latin1

node3
CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `hostname` varchar(64) NOT NULL,
  `port` int(11) NOT NULL,
  `instime` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=51875650 DEFAULT CHARSET=latin1

Thanks
Patrick