Cypher87:
Even so, the flickering shouldn't occur anyway rights? Using pins 3,5 and 6?
Well, I'm sure your circuit isn't the same as mine. I did not have flickering issues with PWM controlled brightness on LEDs, so yeah, I'd say something's up. Can you post a schematic of how you have things wired up, what components and such? Perhaps collectively we can figure out what's going on ...