The tsclient included with Karmic has a broken tsclient applet. It is a known bug, as simple as a typo. It was discovered over 4 months ago, and a fix has been made upstream.
For whatever reason, nothing has been done other than having the big confirmed.
If you depend on the tsclient applet, as I do, grab the package from debian and install it.
Grab the package for you architecture from here.
And simply install it with dpkg:
$ sudo dpkg -i tsclient_0.150-3_i386.deb
The only difference between this release and the one previous is the removal of this bug, which is a fairly serious bug. Including this in the karmic repo would be trivial, and it should have been done before the 9.10 went final.