Is it possible for a nearby wireless network to overpower and slowdown another network? We have some new neighbors that have been moving in next door this week. Last night I noticed a new SSID in Airport that I hadn't seen before, which I assumed might be the new people. But ever since I noticed this new network, MY network's signal strength has been iffy. I used to have all four bars rock solid all the time, today it varies between 1 and 4 constantly and probably averages a 2.5. Any ideas?