I bug in the linux version.
When pgAdmin opens, it has by default selected "Server Groups"
On Windows you can just arrow down to get to your database
However,
On linux you cannot arrow down from "Server Groups", one needs to take
their mouse and select the database, then one can right arrow down arrow
etc..
On linux (functionality does not work)
Ubuntu 12.04 LTS
pgAdmin 1.16.0(Sep 7 2012, rev: REL-1_16_0)
On windows (functionality does work)
Windows 7
pgAdmin 1.16.0(Sep 7 2012, rev: REL-1_16_0)