Hi all. I'm on my fourth 2012 27" iMac and after 10 days of flawless use I've had image retention pop up on this unit for the first time. The other three all had IR issues that were fairly persistent (I could recreate the issue nearly every time if I had a second monitor attached). I really love the iMac (3.4 i7, 680MX) and want to keep the machine, but I'm worried that IR might become more invasive over time. Currently, I only had a mild issue with IR after running the machine for 10 hours noticing the interlaced looking image left over from my RDC session to my work PC. The image stayed around for maybe 30-45 mins before fading. Based on the fact that IR is somewhat "normal" to all IPS displays (per Apple), what would you do? Keep it and hope that its a non-issue (I would purchase AppleCare for the long haul if I did keep it)? Or should I just cut my loses and call a lemon a lemon and just get my money back?