BUG #5432: pg_dump (8.4.3) copy database failure!

The following bug has been logged online:

Bug reference:      5432
Logged by:          y.y.Chen
Email address:      yychen@clhs.tyc.edu.tw
PostgreSQL version: 8.4.3
Operating system:   OpenSuSE  and XP
Description:        pg_dump (8.4.3)  copy database  failure!
Details:

Server A:Ver 8.4.3
Server B:Ver 8.4.2

pg_dump in A=> pg_dump -h A  db > file      =>failure
pg_dump inB => pg_dump -h A  db > file      =>success

While dump failure and pg_dump can't run to over !
It's possible then  pg_dump fail at field with character varying(480)!