The ArtRage app for iPad has been upgraded to version 1.4 to support the Retina display of the new iPad. This update also resolves some of the issues that appeared in the previous build (version 1.3.2). For those of you who don’t know, ArtRage allows anyone to paint on their iPad by making use of different painting tools such as watercolors, inking pens and oils. This new updated version works for iOS 4 or later, is priced at $4.99 and can be downloaded form here. Hit the break below to find out what al...