Yet another Firefly Server iTunes 10.5+ issue

Have you installed 4.1.10? Firefly should be able to stream your Music to iTunes after that firmware update has been installed. The firmware update is more reliable than installing the add-on

The Firefly update was included in 4.1.9. Since there is no change to Firefly between 4.1.9 and 4.1.10 there is no mention of it in the 4.1.10 Release Notes. Unfortunately there is no mention of it in the 4.1.9 Release Notes either but if you compare the 4.1.8 and 4.1.9 GPL you will see some changes for Firefly (mt-daapd). See http://www.readynas.com/forum/viewtopic.php?f=35&t=64509

I have compared the GPL of 4.1.9 and 4.1.10 and there are no GPL changes for Firefly (mt-daapd)

I would suggest updating to 4.1.10

If you like you could update to 4.1.11-T1 which has a further update to the iTunes (Firefly) service: http://www.readynas.com/forum/viewtopic.php?p=361838#p361838