So yesterday I was cleaning the screen on my iMac with a microfiber cloth and I had the screen titled up and the screen saver came on and I could notice like my menu bar and where I keep my iChat window on the left side. I was stunned I thought only plasma tvs and those old CRT monitors burned in like that? So when LCD came out there was no burn in thus people didn't have to use screen savers. ( For me I just like using screen savers ) Is this normal or is there something wrong? Mind you its a 21.5 inch base model iMac.