SSH not working anymore...

I recently ran into the following problem when trying to ssh into my Ubuntu 11.04 server:

>> ssh user@site.com

PTY allocation request failed on channel 0

This occurred after I upgraded to Lion. I can SSH from any other machine without a problem.

I've seen a few other posts saying they're having issues with SSH and Lion as well. Here's the -v output:

GLPro:~ greg$ ssh -v user@site.com

OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011

debug1: Reading configuration data /etc/ssh_config

debug1: Applying options for *

debug1: Connecting to xxxx [xxx.xx.xx.xx] port 22.

debug1: Connection established.

debug1: identity file /xxx/xxx/.ssh/id_rsa type 1

debug1: identity file /xxx/xxx/.ssh/id_rsa-cert type -1

debug1: identity file /xxx/xxx/.ssh/id_dsa type -1

debug1: identity file /xxx/xxx/.ssh/id_dsa-cert type -1

debug1: Remote protocol version 2.0, remote software version OpenSSH_5.8p1 Debian-1ubuntu3

debug1: match: OpenSSH_5.8p1 Debian-1ubuntu3 pat OpenSSH*

debug1: Enabling compatibility mode for protocol 2.0

debug1: Local version string SSH-2.0-OpenSSH_5.6

debug1: SSH2_MSG_KEXINIT sent

debug1: SSH2_MSG_KEXINIT received

debug1: kex: server->client aes128-ctr hmac-md5 none

debug1: kex: client->server aes128-ctr hmac-md5 none

debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent

debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP

debug1: SSH2_MSG_KEX_DH_GEX_INIT sent

debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY

debug1: Host 'neek.us' is known and matches the RSA host key.

debug1: Found key in /xxxx/xxxx/.ssh/known_hosts:1

debug1: ssh_rsa_verify: signature correct

debug1: SSH2_MSG_NEWKEYS sent

debug1: expecting SSH2_MSG_NEWKEYS

debug1: SSH2_MSG_NEWKEYS received

debug1: Roaming not allowed by server

debug1: SSH2_MSG_SERVICE_REQUEST sent

debug1: SSH2_MSG_SERVICE_ACCEPT received

debug1: Authentications that can continue: publickey,password

debug1: Next authentication method: publickey

debug1: Offering RSA public key: /xxxx/xxxx/.ssh/id_rsa

debug1: Server accepts key: pkalg xxx-xxx xxxx xxxx

debug1: Authentication succeeded (publickey).

Authenticated to xxxx ([xxx.xx.xx.xx]x).

debug1: channel 0: new [client-session]

debug1: Requesting no-more-sessions@openssh.com

debug1: Entering interactive session.

debug1: Remote: Forced command.

debug1: Remote: Port forwarding disabled.

debug1: Remote: X11 forwarding disabled.

debug1: Remote: Agent forwarding disabled.

debug1: Remote: Pty allocation disabled.

debug1: Remote: Forced command.

debug1: Remote: Port forwarding disabled.

debug1: Remote: X11 forwarding disabled.

debug1: Remote: Agent forwarding disabled.

debug1: Remote: Pty allocation disabled.

debug1: Sending environment.

debug1: Sending env LANG = en_US.UTF-8

PTY allocation request failed on channel 0