I had similar problems with a 4051 multiplexer. The answer I got that it was not good with driving LEDs, read this discussion: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1281382049
I had similar problems with a 4051 multiplexer. The answer I got that it was not good with driving LEDs, read this discussion: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1281382049