[smartBridges] ghosts of fw past??

[Sevak Avakians]

A customer of mine is using an indoor airBridge on XP less than half a block away from the basestation.  The radio is situated on the window sill (inside) and signal strength and link quality are good.  Problem is that every now and then he cannot get onto the Internet.  Blue light is blinking.  Each time I go there, I power everything down, make sure the connectors are solid and reboot everthing.  After a few minutes -WHAM!- back online.

Since we have upgraded the firmware on all our APPOs and ABs, could it still be possible that the old disassociation issue is around??  If not, then what else can this be?