BUG #6111: ftell mismatch error

The following bug has been logged online:

Bug reference:      6111
Logged by:          glum
Email address:      gene.lum@rsa.com
PostgreSQL version: 9.0
Operating system:   Windows 7
Description:        ftell mismatch error
Details:

I'm trying to dump a small database using the command line:
pg_dump -Fc -Z9

I see a bunch of errors at the end:
"ftell mismatch with expected position"

I can use the same command on Unix without problem. In addition, using
option "-Ft" works on the same platform.

Any solution or suggestion for workaround will be appreciated. Thanks.