After setting client and server with the public keys and allowing PubKeyAuthentication yes, I issue the following command and get a shell that waits indefinitely.
mad@amd:~> ssh -T firstname.lastname@example.org Linux debian 2.6.32-5-686 #1 SMP Sun May 6 04:01:19 UTC 2012 i686 The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law.
If I type a semicolon, the shell breaks with an error message of syntax error on bash line 2 and the ssh connection drops...
In /var/log/auth.log I see a session opened and no error.
Giving more vvv to the ssh command does not alter the last lines of output nor the behavior.