Suddenly started getting ' Deauthenticating with station .... (reserved 2)'

A problem just started today when I brought home my iPad-2 (working fine). I have an a 2TB time capsule (version 7.5.2) that suddenly started refusing our two iPhone wifi connections with ' Deauthenticating with station .... (reserved 2)'. They worked fine until today. I can't figure out why this is happening and not sure if it is related to the new iPad-2. We have iPad 1 and 2's that are working fine. The time capsule log shows one other MAC that is also getting the 'Deauthenticating with station' msg, I am not sure what device it is and not sure if that has always been happening or not. My iPhone wifi worked fine at the Apple store and at a local Starbucks. Everything has worked perfectly until today. The timecapsule shows a normal status.

Suggestions?