BUG #5305: Postgres service stops when closing Windows session

The following bug has been logged online:

Bug reference: 5305
Logged by: Cristian
Email address: cbittel(at)gmail(dot)com
PostgreSQL version: 8.3.9
Operating system: Windows 2003 Server Standard x64
Description: Postgres service stops when closing Windows session
Details:

We connect to Windows server using the Terminal Services Clients (mstsc),
and performs maintenance task with pgAdmin 3.

PostgreSQL service crashes when the user close session on Windows, and the
following error is recorded in the pg_log files:

LOG: server process (PID 5200) exited with exit code 128

LOG: terminating any other active server processes

WARNING: terminating connection because of crash of another server process

DETAIL: The postmaster has commanded this server process to roll back the
current transaction and exit, because another server process exited
abnormally and possibly corrupted shared memory.

HINT: In a moment you should be able to reconnect to the database and
repeat your command. ..

The server has the following specs:

Windows 2003 SP2 Standard 64-bit, 4GB, NOT joined to a domain.

PostgreSQL 8.3.9

pgAdmin 3

We connect without the /console parameter.

Any ideas?