migration

I'm having trouble migrating DB from postgreSQL 7.4 to 7.4.7:

During restore I'm geting all kind of errors like :

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ERROR:  column "txt_name" has a type conflict
DETAIL:  character varying versus pg_catalog.varchar
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(txt_name is inherited field)
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ERROR:  relation "doc_inventory" does not exist

ERROR:  column "f_has_doc" is of type boolean but expression is of type integer
HINT:  You will need to rewrite or cast the expression.

ERROR:  column "dat_pay_term_in" is of type timestamp without time zone but expression is of type integer
HINT:  You will need to rewrite or cast the expression.

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I've also tryed to move DB from 7.4 (linux) to 7.4 (cygwin) but same errors acured.

Is there some bug in 7.4 or pg_dumpall i should know about ?

Any idea?

Boris