Apple is using a bonding agent called Organofunctional Silane Z-6011 to bond the layers of glass. Apparently, Apple (or more likely Foxconn) is shipping these products so quickly that the evaporation process is not complete. However, after one or two days of use, especially with the screen on, will complete the evaporation process and the yellow “blotches” will disappear. […]
Some support site users who initially experienced the yellow blotches are now saying that, having been using their handsets for a few hours (often in relatively warm climates), the patches are no longer visible.
That’s… wow. Mother of all first impressions. (But I’m glad; you had me scared there for a day.)