wow, you're having some serious problems there. could you try with installing kp51r1 (or, in other words, any latest from repositories) on freshly flashed device and see, if problem ever happen again?

BTW, I would recommend using Advanced Interface Switcher in place of Wifi Switcher? the latter is very outdated, and I remember it had some part of code inferior (can't recall what it was).

sorry for not being more of a help, I've never saw something like that. I hope it isn't hardware problem with WiFi adaptor, that result in it being reset and firmware re-loaded.

/Estel