A new report claims to shed light on a number of design changes to the second-generation iPad, which is expected to be announced by Apple in early 2011. In addition to slimming changes that will see the iPad shrink from its current 242.8mm height by 189.7mm width by 13.4mm depth down to approximately 239mm tall by 186mm wide by 10.4mm deep—roughly 3mm smaller in every dimension—the new iPad will feature an improved speaker, twin cameras,…