Cant migrate database from linux to win32 (pgsql 8.0)

Hi all, i am trying to restore a database, the dump is produced under
linux using pg_dump, and i get the following error every time:

ERROR: missing data for column "xxx"
CONTEXT: COPY table_yyy, line 18986: "18833 ?Σ"

I can restore the dump under linux just fine, both postgresql (under
win32/linux) use 8.0

Any idea ?
Thanks in advance.
Chris.