Apple released several updates, hereafter is a summary of them.
Time Capsule and AirPort Base Station (802.11n) Firmware 7.3.2
The Time Capsule, AirPort Extreme and AirPort Express Base Station with 802.11n* Firmware 7.3.2 updates include bug fixes.
Mac OS X Server Combo 10.5.4
The 10.5.4 update is recommended for all servers running Leopard Server.
Mac OS X 10.5.4 Update
The 10.5.4 Update is recommended for all users running Mac OS X Leopard and includes general operating system fixes that enhance the stability, compatibility and security of your Mac.
