Apple’s limited developer release of the beta version of iOS 4.1 yesterday makes a handful of small new changes to iOS 4.0, which debuted in June 2010 for iPhone 3G, 3GS, iPod touch 2G, iPod touch 3G, and iPhone 4 devices. For readers who may be interested in what’s changed, we’ve compiled a brief list, along with several screenshots provided by a reader. One subtle change was first spotted in iOS 4.1 but will likely appear in an…