It's very frustrating to do lots of work to isolate and describe a problem, only to have some anonymous expert throw out the work with no explanation.  There was no reason to think that this was ever specific to a chipset, and now Dana delivers the evidence.

On Tue, Jun 3, 2008 at 2:10 AM, Dana Goyette <DanaGoyette@gmail.com> wrote:
This is not just bcm-anything; it happens on my Intel 3945ABG (iwl3945)
card.

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[bcm4xx] WiFi roaming causes NetworkManager to lose routing
https://bugs.launchpad.net/bugs/201202
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