In a country where cyclists are expected to have a working bell on their bikes, it was probably only a matter of time before fixies fell afoul of the law in Germany.

Evolved from indoor track bikes with no gears and brakes, fixies have long been favoured by couriers and other cycling enthusiasts in big cities around the world. But a surge in popularity in Germany has prompted an unprecedented backlash by traffic cops in Berlin in recent months......

http://www.thelocal.de/society/20090630-20291.html