Just got my UM2 yesterday, with the worst issue ever !
I only have the caltest on the SD card and not the ultimaker robot file :(
On a more serious note, the X limit switch wasn't activating, so had to rebolt it correctly (quick fix); and I've got issues with first layers which I assume look as underextrusion.
The rest of this minicaltest did print well as you can see... but I wasn't able to print anything else, the first layers wouldn't stick to the glass and look the same as the ones on this part, even with the glue (UM blue PLA, auto "PLA" settings). Will try a few more things tonight, but would be grateful if you could confirm that it's typically underextrusion ? It's my first printer, but I found the PLA very stiff and with all the stuff I read here about the UM2 extruder being a bit weak, that could be it...
PS : still... would be happy to have the original SD card version of the robot gcode