Apple Computer released AirPort Update 2005-001 Wednesday. The update "fixes reliability and resolves AirPort compatibility issues with certain third party 802.11 cards and access points for Mac OS X v10.4.3 and later."
The update can be found in Software Update, and is a 1.4 MB download. A restart is required. As of this writing, the update is not yet linked on Appleis AirPort Support page.