Looks like the Bulgarian government has collapsed. This is interesting because much focus has been spent on Greece, Italy, Ireland and Spain as nations that would first leave the EU. Yet it seems that one of the most recent entrants, Bulgaria, is seeing catastrophic upheavals.
This affects the EU because of two potential reasons: Whatever government takes shape will undoubtedly request for aid, loan forgiveness, or some other sort of support from the wealthier EU nations like Germany. If no government can contain the unrest than a increase of armed violence will have to be dealt with by the EU. While most of the focus has been on the EU economically, one of the purposes was to foster political stability. While the EU isn't a real supranational state in the way that the USSR or Yugoslavia was, it would be a major blow to the EU if Bulgaria devolved into civil violence.