I recently bought a new Macally AC power adapter for my iBook because the crappy apple one broke. Whenever the adapter is plugged in, my iBook keeps cycling between the AC power and the battery power, thus causing the screen to go light, then dark, then light, then dark... It gets really annoying. It's as if I was constantly pulling out the plug and putting it back in every couple of seconds. The adapter does eventually charge the battery, but is there anything I can do about it? Does anyone else have this issue? I searched but couldn't find anything. Thanks in advance.