The following bug has been logged online:
Bug reference: 6214
Logged by: yulin liu
Email address: e9320(dot)tw(at)gmail(dot)com
PostgreSQL version: PostgreSQL 9.1
Operating system: CentOS release 5.4
Description: can't change Column COLLATE
Details:
can't change Column COLLATE pg_catalog."default" to pg_catalog."zh_TW.euctw"