pg_user pg_shadow out of sync

["Sandy Spence" <axs@xxxxxxxxxx>]

Hi All,

Can any one tell me what I need to do to get this back on if I do a select
on pg_user for a particular user and then do a select on users for the same
user the expiry and valuntil columns are different?  How do I get these to
match?

Cheers,

Sandy