Only problem with charlieplexing is the duty cycle. 64 LEDs = 1/64 duty cycle, or something less if you get fancy, but still bad. LEDS under normal current circumstances can only take about 1/8 to 1/10 duty cycle before brightness drops significantly. To overcome that, most charlieplexing I've seen overdrives the LEDs, and if your code gets stuck, you start blowing pixels. And we are all assuming blackbeard is using single color LEDS. It could be RGB.
Any details of your project blackbeard?