Debug message when sign on QQ
(12:49:33) QQ: Using UDP without proxy
(12:49:33) QQ: Connected.
(12:49:33) QQ: ==> [57681] QQ_CMD_REQUEST_LOGIN_TOKEN, from (QQ2005 or QQ2006)
(12:49:33) QQ: ack [57681] QQ_CMD_REQUEST_LOGIN_TOKEN, remove from sendqueue
(12:49:33) QQ: <<< got a token with 24 bytes -> [default] decrypt and dump
0000: B6 89 9F 53 A1 F4 C6 99 65 D7 2A 75 DF E4 41 8B 6..S!tF.eW*u_dA.
0016: 66 EC 8C 2C 62 52 D3 17 fl.,bRS.
(12:49:33) QQ: ==> [57682] QQ_CMD_LOGIN, from (QQ2005 or QQ2006)
(12:49:33) QQ: ack [57682] QQ_CMD_LOGIN, remove from sendqueue
(12:49:33) QQ: Decrypt login reply packet with inikey, 99 bytes
(12:49:33) QQ: Unknown reply code: 6
(12:49:33) QQ: >>> 112 bytes -> [default] decrypt and dump
0000: 06 C4 FA B5 C4 BA C5 C2 EB D4 DD CA B1 B2 BB C4 .Dz5D:EBkT]J12;D
0016: DC CA B9 D3 C3 B5 CD B0 E6 B1 BE B5 C4 51 51 A3 \J9SC5M0f1>5DQQ#
0032: AC C7 EB B5 BD A3 BA 68 74 74 70 3A 2F 2F 69 6D ,Gk5=#:http://im
0048: 2E 71 71 2E 63 6F 6D 2F CF C2 D4 D8 B0 B2 D7 B0 .qq.com/OBTX02W0
0064: D7 EE D0 C2 B0 E6 B5 C4 51 51 A3 AC B8 D0 D0 BB WnPB0f5DQQ#,8PP;
0080: C4 FA B6 D4 51 51 B5 C4 D6 A7 B3 D6 BA CD CA B9 Dz6TQQ5DV'3V:MJ9
0096: D3 C3 00 SC.
(12:49:33) QQ: Try extract GB msg: 您的号码暂时不能使用低版本的QQ，请到：http://im.qq.com/下载安装最新版的QQ，感谢您对QQ的支持和使用
Let me translate the last sentence.
It said that "the QQ cannot use/sign on the lower version of the QQ client, please go to http://im.qq.com to download the latest version. Thank you for Supporting."
QQ is so fuck. They did this in version 2.0.1 too, and now they did it again.
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My System
Xubuntu 7.04
Pidgin 2.1.0
Debug message when sign on QQ
(12:49:33) QQ: Using UDP without proxy
(12:49:33) QQ: Connected.
(12:49:33) QQ: ==> [57681] QQ_CMD_REQUEST_LOGIN_TOKEN, from (QQ2005 or QQ2006)
(12:49:33) QQ: ack [57681] QQ_CMD_REQUEST_LOGIN_TOKEN, remove from sendqueue
(12:49:33) QQ: <<< got a token with 24 bytes -> [default] decrypt and dump
0000: B6 89 9F 53 A1 F4 C6 99 65 D7 2A 75 DF E4 41 8B 6..S!tF.eW*u_dA.
0016: 66 EC 8C 2C 62 52 D3 17 fl.,bRS.
(12:49:33) QQ: ==> [57682] QQ_CMD_LOGIN, from (QQ2005 or QQ2006)
(12:49:33) QQ: ack [57682] QQ_CMD_LOGIN, remove from sendqueue
(12:49:33) QQ: Decrypt login reply packet with inikey, 99 bytes
(12:49:33) QQ: Unknown reply code: 6
(12:49:33) QQ: >>> 112 bytes -> [default] decrypt and dump
0000: 06 C4 FA B5 C4 BA C5 C2 EB D4 DD CA B1 B2 BB C4 .Dz5D:EBkT]J12;D
0016: DC CA B9 D3 C3 B5 CD B0 E6 B1 BE B5 C4 51 51 A3 \J9SC5M0f1>5DQQ#
0032: AC C7 EB B5 BD A3 BA 68 74 74 70 3A 2F 2F 69 6D ,Gk5=#:http://im
0048: 2E 71 71 2E 63 6F 6D 2F CF C2 D4 D8 B0 B2 D7 B0 .qq.com/OBTX02W0
0064: D7 EE D0 C2 B0 E6 B5 C4 51 51 A3 AC B8 D0 D0 BB WnPB0f5DQQ#,8PP;
0080: C4 FA B6 D4 51 51 B5 C4 D6 A7 B3 D6 BA CD CA B9 Dz6TQQ5DV'3V:MJ9
0096: D3 C3 00 SC.
(12:49:33) QQ: Try extract GB msg: 您的号码暂时不能使用低版本的QQ，请到：http://im.qq.com/下载安装最新版的QQ，感谢您对QQ的支持和使用
Let me translate the last sentence.
It said that "the QQ cannot use/sign on the lower version of the QQ client, please go to http://im.qq.com to download the latest version. Thank you for Supporting."
QQ is so fuck. They did this in version 2.0.1 too, and now they did it again.