Bug in PgAdmin 1.16.1

Don't know if pgAdmin maintainer keep an eye in this list, but here I go:

- Using pgAdmin 1.16.1 in Windows 7 x64 downloaded today

1) You alter a role, adding any information you want: when the
properties page is open, pgAdmin automatically defines a expiration date
on 1969/12/31.

2) You want to remove "superuser" option from a role: when you uncheck
"superuser" box, pgAdmin alerts that removing the superuser from a role
could cause unexpected behavior, and as you to confirm the action. Once
you confirm, the "superuser" option is marked again, and nothing else
happens.

Thanks,

Edson Richter