From https://bugs.launchpad.net/ubuntu/+source/tsclient/+bug/22644
On Ubuntu Gutsy (tsclient version 0.148) I receive an error:
NOT IMPLEMENTED : System pointer message 0x7f00
When I use tsclient to connect to Windows Server 2003 with the default settings.
If I change the settings to use RDPv5, then I do not get the error.
If I use the command-line tool rdesktop, then I do not get the error. I assume this is because rdesktop detects that it should use RDPv5; I make that assumption because rdesktop also gives the Windows XP theme, which I can only get from tsclient if I change the protocol to RDPv5.
Perhaps tsclient could use the protocol detection code from Remote Desktop and use RDPv5 automatically if it is supported by the server.
Also, see
http://sourceforge.net/tracker/index.php?func=detail&aid=1306611&group_id=24366&atid=381347