Sometime my monitor would flicker a little bit. It's very fast but I notice it. Is this the monitor itself or stuff I plug in the power cord that share the power of the ACD? I only have my Karmon Stick II speaker, the mac pro, Motorolla Modem, Linksys Wireless Router. Should I seperate the ACD and the Mac Pro with different Power Cord? I thought Apple Cinema display are flicker free? It started to worry me since I notice it more lately. The Monitor is only 20 days old.