pgAdmin III 1.2.0 RC1 Debian - strange combobox behaviour

Hi,

I have cried wolf on this list before due to a broken RedHat setup, but
I'm now on what should be a squeaky-clean Debian/unstable installation,
updated this morning, and I get the following issue:

Bring up the dialogue to create a new database.
Select an owner for the database from the combobox.
Attempt to select a different owner from the combobox, using the mouse -
*this fails for me.*
Selecting different text encodings (in the next combo) is not a problem.

This applies to many dialogues in the program, but not others.
If the combobox starts off blank, it is possible to select a value.
You can still use the up/down arrows to scroll through the options.

Anybody else see this?

Also, a very minor point. The dialogue for creating a database has a
big box for 'comments' in which it is impossible to type anything. I
guess this should be greyed out rather than just locked?

TIM