LDAP password not accepted on polyanthum

I think PAM thinks my password expired, but changing it through db.torproject.org doesn't help.

sysrqb@polyanthum:~$ sudo -l
[sudo] password for sysrqb on polyanthum: 
Your mind just hasn't been the same since the electro-shock, has it?
[sudo] password for sysrqb on polyanthum: 
Password change aborted.
^[[A
sudo: 1 incorrect password attempt

On perdulce, my password is accepted:

sysrqb@perdulce:~$ sudo -l
[sudo] password for sysrqb on perdulce: 
Sorry, user sysrqb may not run sudo on perdulce.

Any suggestions?