The following bug has been logged online:

Bug reference: 2462
Logged by: Stephen
Email address: jleelim (AT) hotmail (DOT) com
PostgreSQL version: 8.1.4
Operating system: Windows Server 2003
Description: pg_dump ftell mismatch error (cont'd)
Details:

This is a continuation of bug report 2461

I forgot to mention the pg_dump command line used by pgadmin:

C:\Program Files\PostgreSQL\8.1\bin\pg_dump.exe -i -h localhost -p 5432 -U
postgres -F c -b -v -f "C:\Temp\mydatabase.backup" mydatabase

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