Was there an update that would have affected wireless connections? I lost two machines that were otherwise working after a recent update. In both cases they boot but can't reach the router (no encryption key) and are assigned dummy IPs.

After a while it seems they connect, then fall again, this time losing their wireless extensions to the device name (in other words, on both machines iwconfig says they have no wireless capability).

Rather bizarre. I'd love to chalk it up to one particularly fruity installation, but the fact is it's happened on two machines running distinctly different hardware, so I think it's something else.

Anybody seen anything that might explain this? Did I overlook a configuration change or something?

Thanks in advance.