A friend of mine recently discovered a hardware bug in the Arduino Duemilanove:
arduino.cc/cgi-bin/yabb2/YaB … 1284034373
It seems some manufacturers are using a bad replacement for the NDT2955 MOSFET. This
replacement does not switch the USB and input power correctly
I have recently purchased some Arduino Duemilanove boards from Pololu that do not have this MOSFET labeled and they do not work properly. I wanted to make sure you are aware of this issue so you can correct it. I would also like to know what you intend to do to fix the boards I and others have purchased that have this problem. We also need to be assured before purchasing any more boards from you that they come with the proper NDT2995 MOSFET.
You can also read more information about this bug and some tests to see if the MOSFET is
david-laserscanner.com/forum … f=9&t=2261
Please discuss here if you have similar issues with an Arduino purchased from Pololu.