On Sat, 2 Feb 2008, Bart Schaefer wrote:
I'm not *entirely* sure but this began happening at about the time I installed the latest kernel updates for CentOS 5.1 (kernel-2.6.18-53.1.6.el5.i686.rpm from January 24). Shortly before that I changed the encryption on my wireless router and switched from ndiswrapper back to the standard bcm43xx driver, but I'm pretty sure the network was OK before that update for the simple reason that I was able to download the update itself.
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What do you see in dmesg? Does the last bcm43xx message show that you are associated or not?