Something like pg_dump for 7.4

I am trying to migrate a modest sized database (the unload file is just under a gigabyte) which is moderately complex,
usingschemas and the like from 7.4 to 8.1 

Alas, pg_dump appears to incompatable with my needs as it keeps introducing invalid UTF-8 characters.

I have gone back and changed the offending data rows with SQL to make damned sure there are no illegal characters. I
redump,compress the thing, scp it and try to reload. Same error every time: 
psql:glacier_load.sql:1017: ERROR:  invalid UTF-8 byte sequence detected near byte 0x96
CONTEXT:  COPY clients, line 1751, column client_name: "XYZ Media  AB&E"
psql:glacier_load.sql:3019: ERROR:  current transaction is aborted, commands ignored until end of transaction block

See that double space after "Media" ? That's actually a single space, a dash, and another space: "XYZ Media - AB&E",
butevery export turns it into: 
XYZ Media <96> AB&E

Is there any way to do this ? I can't edit the resulting dump file by hand -- it's huge. And pg_dump on 7.4 does not
knowhow to a table inside a schema -- it seems to be all or nothing. 

TIA,

Greg Williamson
DBA
GlobeXplorer LLC