iPhone Life magazine publisher David Averbach found that his iPhone 4S had a serious bug after updating to the latest version of iOS 5. His phone no longer remembered the names of any of his contacts. A post by Paul Hontz on The Startup Foundry clearly desicribes the issue. Apparently it only affects Verizon iPhone 4S users and only if you update your iOS software over-the-air. According to Hontz, his contacts are still there, but the person's name wouldn't appear if he got a call or text message.