48X24X48X:
Hi Lefty,It's an ATMega328 on a small breakout board with the FTDI 6 pin header together with the reset capacitor.
It's weird because it upload once but not the 2nd and so on.
Well try a manual reset upload. Press and hold down a reset switch (install a switch if needed). When you see the IDE report the compiled sketch size in the output window, release the reset button.
Lefty