I am having many of the same problems as Pablo and I need to know what firmware worked so I can get this fixed. I have done everything mentioned here and elsewhere. Swapped EXP1 <-> EXP2, uncommented #define REPRAP_... etc. Nothing helps. I am now stuck with the Smart graphic controller flashing and beeping. Been at it for many hours and I'm stumped. It compiles well and uploads to the RUMBA board. Turn it on and it starts flashing and beeping. Press or turn the select knob and it stops. No backlight or display. I'm using a RUMBA board and the Full Graphic Smart Controller compiled with Arduino 1.0.5-r2. If you could post here what firmware version is known to work with the RUMBA and the Full Graphic Smart Controller that will probably help others along the way as well. I've got a feeling this problem will go on for a while. Who knows when the Arduino team will get this fixed! Thanks!