Following the problem described above, I have gone back to version 188.8.131.52 using a kickstart cd and my software works as normal. Just installed using 184.108.40.206 again and my serial comms software fails again
I have also checked the /etc/inittab to see if anything was setup to poll the serial ports but nothing obvious there either.
Absolutely no idea where else to look so any pointers no mater how obvious they may seem would be greatly welcomed.
Thanks for any help