That FW v2.09 has proved to be quite stable for me, except that my ultra-reliable rock steady Kaleidescape system mis-behaved once when I tried to install a new M-Class player on my network. Despite being set to DHCP the player couldn't get an IP from the DLINK router (my network DNS server), and so couldn't communicate with it's server on the network. Although it could call home to Kaleidescape HQ in Sunnyvale and tell them it wasn't happy. Resolved by router re-boot. All good since.