Sorry to hear you had problems with the Toastman build on your box.
You might want to try running a copy of the freeware program inSSIDer a try while you are running Shibby and see what channel and signal types your router is sending while on a laptop.
Possibly someone is stepping on the channel(s) you are using with their box. Then when you get a chance compare what inSSIDer gives you when you run the Toastman build. Might be a default wireless setting is different between the two builds which an inSSIDer scan might show.
One possible change might be the "N" band might be set to 20 rather than 40 MHz in width between the two builds and only the one device is complaining, in it's own way...