AirPort card update 3.4.3 available [update]

Airport Card update version 3.4.3 is available for all Airport Extreme-equipped Macintosh. This update is related to AirPort 4.0:

AirPort Card Update 2004-08-31 improves reliability in mixed 802.11b and 802.11g environments and is recommended for all customers with AirPort-capable computers running AirPort 3.4 and later, including AirPort 4.0.

[Update]
Apparently, this new version is fixing the audio problem sometimes faced by users when using AirTunes in a mixed 802.11b and 802.11g environment.