socket_select() problems?

With the latest cvs, if you turn on chargen (port 19 tcp) and run this: <? $sock1 = socket_create (AF_INET, SOCK_STREAM, 0); if($sock1 < 0) die(socket_strerror($sock1)); $res1 = socket_connect($sock1, '127.0.0.1', 19); if($res1 < 0) die(socket_strerror($sock1)); $sock2 = socket_create (AF_INET, SOCK_STREAM, 0); if($sock2 < 0) die(socket_strerror($sock1)); $res2 = socket_connect($sock2, '127.0.0.1', 19); if($res2 < 0) die(socket_strerror($sock1)); $read = array($sock1,$sock2); while($num=socket_select($read, $write=NULL, $except=NULL, NULL)) { for($i=0; $i<$num; $i++) { $msg = socket_read($read[$i],1024); echo "[$i] ".strlen($msg)."\n"; } } ?> I am seeing that every now and then when I run it the output is: [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 [0] 1024 Sometimes it does work properly and it hops back and forth between the two spewing sockets: [0] 1024 [1] 1024 [0] 1024 [1] 1024 [0] 1024 [1] 1024 [0] 1024 [1] 1024 [0] 1024 [1] 1024 [0] 1024 [1] 1024 [0] 1024 [1] 1024 [0] 1024 [1] 1024 I would expect to always see it alternate between the two like this. Can anybody reproduce/explain this? -Rasmus