I don't know if this has got something to do with the illuminations and the big beardy man coming etc by my poorly Fazer is doing this since Friday. Lights come and go, rev counter drops to 0 and back etc - it's as if someone is turning off and on the ignition. Based on this thread, I will check the wires, fuses etc (when/if I get a dry day that is bright enough to see what I am looking at) and will report back.
Oh, sorry about digging out an ancient thread.