IpcMemoryDetach

I'm using a servlet-engine and the PostgreSQL JDBC driver to connect to a Cygwin version of PostgreSQL 7.0.3 that I
havecompiled ... using also ipc-daemon 1.8 i think the version is ... whatever the latest is .. anyways i've been
havingthis problem today and I can't figure out why .. it happens when i shut down the servlet-engine and abruptly kill
connections.. 

and it has never happened before

/usr/local/pgsql/bin/postmaster: ServerLoop: select failed: No children
proc_exit(1)
shmem_exit(1)
NOTICE:  IpcMemoryDetach: shmdt(0x0x7190000): Invalid argument
NOTICE:  IpcMemoryDetach: shmdt(0x0x7060000): Invalid argument
NOTICE:  IpcMemoryDetach: shmdt(0x0x7050000): Invalid argument
exit(1)

anyone have any ideas what this might be?

i'm running a win2000 box

-a