System keeps looking for a 'server' that does not exist. Is says the old name of my Airport Extreme. Clicking it away (4x) it gets through.

System keeps looking for a 'server' that does not exist. Is says the old name of my Airport Extreme. Clicking it away (4x) finally  gets through.

Other weirdness to report: my neighbor upstairs appears to have a Linksys router network on channel 6. My AEBS is on channel 1 so there shouldn't be interference... but according to iStumbler sometimes the signal leaps to 64000 (keep in mind my own Airport never tops 60)! Is that potentially the problem?
Might it be possible that your neighbor just acquired a 802.11n (pre-N) wireless router recently?
802.11n effectively increases capacity by doubling the number of Wi-Fi radios and increasing the number of antennas used to push signals out of those radios. 802.11n splits a data frame into multiple pieces. It then transmits these pieces in parallel using multiple radios that are attached to multiple antennas. These antennas blast out signals from virtually the same vantage point – scattering the signals everywhere.
You may find the following ZDNet article interesting: http://blogs.zdnet.com/Ou/?p=247
Even if he did not, and you are on good terms, you might want to ask if he can temporarily turn off his wireless, or, at least, reduce the signal strength to see if that will help in your situation.

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