Should we have a FAQ?

[readbueno]

Hi All, Despite having a measured, with a DVM, a voltage of 5.02 Volts at the usb mini "B", the voltage that is showing when I look at Vin on the signals page is giving me 3.96 Volts.
I have tried several different power supplies and these two figure only vary by a very small amount.
What is the problem?
What should I be looking at to fix it?
Thanks,

Brian.