Explodes PSU after 30sec

The Cubie a week ago received directly from SunFounder. The processing of the case and the board is very good. To assemble the housing a small tutorial would be nice. I have it 2x apart again genonnen (1x after I discovered the reset buttons for insertion and a 2nd time after I had understood the meaning of the cover above the LEDs (1 Star deduction for it).

Unfortunately, shortly after the first start the supplied original power supply has exploded (see picture). I absolutely understand no fun with elektrischer- and fire safety, I can only awarded 1 star for the offered package from here Cubietruck + PSU unfortunately.

The seller has responded exemplary and immediately asked for consequential damages. He has offered on its own initiative a refund of 20 Euro. So now I'm in the AppleStore (not Amazon), the real (!) Apple 12W PSU buy (19 euros) and will hopefully still with the Cubie still happy. It is not easy here 2.5A USB to find power supplies, which have no negative comments about the safety ...