Ok, I followed the link to your walk-trough, and you did this:
# If Cache drive is online, start SABNzbd
if [ -d /mnt/cache ]; then
# Start SABnzbd and sickbeard
installpkg /boot/custom/SABnzbdDependencies-1.3-i486-unRAID.tgz
python /mnt/cache/.custom/sabnzbd/SABnzbd.py -d -s 192.168.1.6:88
nohup python /mnt/cache/.custom/sickbeard/SickBeard.py &
fi
The command line option -s <address>:<port> overrides the default, and shouldn't be called every time SABnzbd is started...well, it can, but there is no point in it as the port should be controlled via the config file so it can be changed from the UI rather than having to change the go script. That's my opinion mind you.
So the default port is 8080, but the instructions you used forced it to be 88. We should stay away from any port under 1024 for previously stated reasons.