pgAdmin and AWS Redshift Connection problems

Hello!

AWS Redshift, while proprietary, allows one to connect through any client
that utilizes Postgres 8.0 drivers. Approximately a week ago, I tested
connecting to a Redshift cluster through pgAdmin v1.12.3 [for postgres 8.0]
on Ubuntu through the master user which AWS provides, which has superuser
privileges. So:

host = hostname which AWS provides
maintenance db = default db name
user = aws superuser
pw = my pw
port = 5439 [the port redshift uses]

And about a week ago, this all worked. I was able to run queries, see the
results, the whole shebang. As of a few days ago, however, pgAdmin stopped
working. I would use the exact some information to connect, and it would
appear to be connected. However, there would be no databases [it said
databases(0)], and when I tried to expand the databases in the explorer, I
would get the error "ERROR: must be superuser to examine
default_tablespace". I thought, okay, that's strange, so I tried using
psql from the command line on Ubuntu:

$ psql -h hostname -d dbname -p 5439 -U superuser

and I was able to get in, run queries, create tables, all that nice stuff.
What I couldn't do was run the command SHOW default_tablespace; - that
returned the error:

ERROR: must be superuser to examine "default_tablespace"

I found it slightly weird, because if you run the \du command, it says:

Role name | Attributes | Member of
-----------+----------------------+-----------
myuser | Superuser, Create DB |

After asking around, it was chalked up to AWS tweaking the internal
workings to prevent users from doing certain things, so I don't think
there's anything pgAdmin can necessarily do about that. What I am curious
about, however:

is it possible to get around this in pgAdmin? Why is it I can query the
databases in psql, but not pgAdmin, and is it something that can be worked
around in pgAdmin?

Thanks for your help!

Justin