[ale] ssh authorized_keys2, what am I missing?

[Grant Robertson]

This is driving me nuts. Any suggestions appreciated.

Debian 3.1, openssh 3.8.1p1 / Putty

I'm trying to use an RSA key to authenticate an ssh client connection,
but the key is refused. I've set logging to DEBUG in the sshd_config,
and it does show that it's attempting the keyfiles, but it doens't
give me detail on the failure. The authorized_keys2 file is set to 640
(I've also tried 440, 400, 600).

I'm lost as for what to try next, any suggestions?

Relevant snippet from logs..

Jun  8 12:59:54 dev1 sshd[12255]: debug1: PAM: initializing for "groberts"
Jun  8 12:59:54 dev1 sshd[12255]: debug1: PAM: setting PAM_RHOST to
"xxx.xxx.xxx.xxx"
Jun  8 12:59:54 dev1 sshd[12255]: debug1: PAM: setting PAM_TTY to "ssh"
Jun  8 12:59:54 dev1 sshd[12255]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
Jun  8 12:59:54 dev1 sshd[12255]: debug1: trying public key file
/home/groberts/.ssh/authorized_keys
Jun  8 12:59:54 dev1 sshd[12255]: debug1: restore_uid: 0/0
Jun  8 12:59:54 dev1 sshd[12255]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
Jun  8 12:59:54 dev1 sshd[12255]: debug1: trying public key file
/home/groberts/.ssh/authorized_keys2
Jun  8 12:59:54 dev1 sshd[12255]: debug1: restore_uid: 0/0