PostgreSQL abnormally terminating with signal 5

Hi,

I´ve a PostgreSQL 8.0.13 running in a Windows XP Pro 2002 SP2 box that is
terminating abnormally with signal code 5 every time I make a simple select
in one of our tables.

2007-06-04 21:24:12 LOG: database system was shut down at 2007-06-04
21:23:42 E. South America Standard Time
2007-06-04 21:24:12 LOG: checkpoint record is at 4/7D7FFC68
2007-06-04 21:24:12 LOG: redo record is at 4/7D7FFC68; undo record is at
0/0; shutdown TRUE
2007-06-04 21:24:12 LOG: next transaction ID: 1783448; next OID: 3111310
2007-06-04 21:24:12 LOG: database system is ready
2007-06-04 21:27:39 LOG: server process (PID 3512) was terminated by signal
5
2007-06-04 21:27:39 LOG: terminating any other active server processes
2007-06-04 21:27:39 LOG: all server processes terminated; reinitializing
2007-06-04 21:27:40 LOG: database system was interrupted at 2007-06-04
21:24:12 E. South America Standard Time
2007-06-04 21:27:40 LOG: checkpoint record is at 4/7D7FFC68
2007-06-04 21:27:40 LOG: redo record is at 4/7D7FFC68; undo record is at
0/0; shutdown TRUE
2007-06-04 21:27:40 LOG: next transaction ID: 1783448; next OID: 3111310
2007-06-04 21:27:40 LOG: database system was not properly shut down;
automatic recovery in progress
2007-06-04 21:27:40 FATAL: the database system is starting up
2007-06-04 21:27:40 LOG: record with zero length at 4/7D7FFCA8
2007-06-04 21:27:40 LOG: redo is not required
2007-06-04 21:27:40 LOG: database system is ready

select version();
PostgreSQL 8.0.13 on i686-pc-mingw32, compiled by GCC gcc.exe (GCC) 3.4.2
(mingw-special)

Is there anything I can do to help solve this problem?

Thanks!

Reimer