unconvertible BIG5 character 0xf9d8

Hi!

My 8.0beta2 database was initialized with option "-E UNICODE". Psql sets
client encoding to Big5:

database1=# \encoding big5

I get this error when inserting Big5 character 0xf9d8:

WARNING:  ignoring unconvertible BIG5 character 0xf9d8

Any idea?

Regards,
CN