iTunes Connection Problem

Hopefully someone can give me a hand with this:

When I access the Firefly shared library using iTunes on my server, it takes a few seconds, but displays all 21,290 songs (111.5GB), and works beautifully.

When I access the shared library (in Firefly) from my laptop, connected to the server by a simple, unmanaged Gigabit Netgear Ethernet switch, the shared library listing is available, but it hangs at the “Loading ‘‘…” message. When I use iTunes sharing in this configuration, my laptop is able to access it just fine.

I live in a building where Ethernet access is provided to each room by a 100mbps wall outlet. When my library is shared with iTunes, I can connect to it in other rooms. When my library is shared with Firefly, I cannot do this.

My server is running Firefly Nightly 1586. The previous stable release exhibited the same issues.

Are there known issues Could this be a problem of magnitude? What size libraries have other people been able to serve with Firefly?