pgAdmin v 1.16.1
Windows 7 x64
PostgreSQL v9.4.2
CentOS 6.4
pgAdmin by default when editing a user's account settings seems to set
Account Validity to '1969-12-31 00:00:00+01' if the role is defined as valid
until infinity.
This results in the user not being able to login, and only receiving a
password authentication failed error message (Account Expired would be more
helpful, but that's for Postgres ;)).
An example would be adding a user to a group role via the Role membership
tab, and never actually opening the Definition tab.
You'd be blissfully unaware that Password validity had been changed.
Best regards,
Brett