Comment 1 for bug 208103

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Chris Jones (cmsj) wrote : Re: Upgrade from 0.99.2-3ubuntu5 to 0.99.2-3ubuntu6 breaks wireless after resume (iwl3945)

One of the changes in 0.99.2-3ubuntu6 is to unload network driver modules before suspending, as some of them can prevent suspends from working correctly.
For what it's worth, this behaviour of removing network drivers is how gutsy worked. Oddly, your dmesg looks like the driver gets reloaded and initialised fine on resume.