BUG #6233: pg_dump hangs with Access Violation C0000005

The following bug has been logged online:

Bug reference:      6233
Logged by:          Holec
Email address:      holec@email.cz
PostgreSQL version: 8.4.8
Operating system:   Windows 7
Description:        pg_dump hangs with Access Violation C0000005
Details:

I use pg_dump on Windows 7 with:
pg_dump -i -h 192.168.2.2 -p 5432 -U user -F c -b -v -f file.backup mydb

Last output is:
pg_dump: reading dependency data
pg_dump: saving encoding = WIN1250
pg_dump: saving standard_conforming_strings = off
pg_dump: saving database definition

and then Windows error messagebox and pg_dump returns Access Violation
C0000005

In Windows I can find out:
Name of error application: pg_dump.exe, version: 8.4.8.11104, timestamp:
0x4da83e6a
name of error modul: ntdll.dll, version: 6.1.7600.16695, timestamp:
0x4cc7ab44
Exception: 0xc0000005
Offset of error: 0x0005207e

*On Windows XP the same pg_dump works fine!
*On Windows 7 with -a (data only) pg_dump works fine too!!!

Regards, Pavel