iTunes 9 drops connections to remote ...

Using Snow Leopard 10.6.1 (Mac Mini) and the following hardware:
-An Airport Extreme firmware 7.4.2 (connected to computer using ethernet)
-Two airport expresses (firmware 7.4.2) connected to remote speakers.
-WPA2 encrypted network
-iTunes 9.0 (70)

After updating to Snow Leopard 10.6.1, iTunes 9 regularly drops the Airtunes connection to the two sets of remote speakers. The connection drop only seems to happen after the main computer has gone to sleep and woken back up. This problem never happened using 10.4.11 and exactly the same hardware setup. This system worked flawlessly for over a year on Tiger and now this problem started right away after upgrading to snow leopard. There is no error number reported, iTunes 9 just churns when asked to play music and eventually pops up an dialog box that says "Remote speakers could not be found. Would you like to use the computer speakers?"

Quitting and then relaunching iTunes 9 fixes the problem and I can then connect and stream to the remote speakers (that is until the main computer goes to sleep again)

Does anyone know how to resolve this?

---

Orignal From: iTunes 9 drops connections to remote ...