Sony's Xperia S was launched at CES earlier this year and saw its release not too long ago, but it seems that being an early adopter certainly has its shortcomings. There have been reports of yellowish patches appearing on the Xperia S' display, an issue that has plagued many devices in the past, such as the iPhone 4 and the Samsung Galaxy S2. Sony has since come forward and admitted that there were some manufacturing issues that could have led to this. According to the company, the Xperia S is transient and temperature-dependent, therefore the yellowish patches only shows up when the device gets sufficiently warm.
Ubergizmo, Sony admits the Xperia S' display has some discoloration issues