Is NAS working now? I didn't see anything about this in the change log.
NAS works under 5440 and 7317 on my side, if you customize your /usr/local/etc/rcS script:
add this two lines:
mount -t cifs //192.168.1.1/fritz.nas /tmp/usbmounts/sda1/NAS -o username=youruser,password=yourpwd
You can choose the mountpoint, in this example NAS, and you need to know your nas adress