Just another day and another service advisory from Canon. Well, actually, an announcement of an upcoming service advisory (seriously, is there anything Canon can't pre-announce? They've even taken to announcing firmware updates before they actually announce them. Weird.) This time, the worry is over a run of T4i's where, over time and use, the grip will turn white. Why? Chemistry! No, really, Canon has a pretty superficial but surprisingly technical explanation of how the rubber accelerator can be bonding with environmental elements to produce a zinc by-product which then makes the grip white. This is mostly cosmetic, but, under certain circumstances there may be mild allergic recommendations. If your grips have already turned white, Canon recommends washing your hands after handling, and avoiding rubbing your eyes. No really. If your camera doesn't have white grips, but you're now worried it might, you can go to their site and punch in your serial number and it'll tell you in no uncertain terms if your model is affected or not. if you have an affected model, hang tight, they're working on what to do with it.