The yellow tint issue with the LED displays has still not been addressed and people keep getting defective displays with just 1/4 or 1/3 of the display showing a yellowish tint. I'm wondering if anybody around here actually knows the cause of this issue and why it seems so difficult for Apple to fix? It's not like Apple's LCD manufacturers are subpar - they're the big names in the business: LG, Samsung, AUO etc. So what's the problem? Surely these large manufacturers must have seen this before they released their products? And surely there must be a solution?? Anybody able to explain what's actually happening, on a technical level? Thanks!