by 
In a move that surprised developers, the Apple developer portal is displaying app icons as perfect squares with sharp edges, rather than the rounded corners normally seen. It is as yet unclear if this is a hint of changes to come in the forthcoming iOS 7 update — which has been rumored to offer a “flatter” design eschewing most shadows and other “3D” effects — or if it is a simple temporary removal of the rounded-corner “mask” normally covering the square icons submitted by developers while Apple tweaks the design….
