On a LInux 64 biut system:
$ psql
psql (9.1.0)
Type "help" for help.
gavin=> DROP TYPE raindow;
ERROR: type "raindow" does not exist
gavin=> CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green',
'blue', 'purple');
ERROR: type "rainbow" already exists
gavin=>