Xcode 4.3: Codesign操作失败(检查您选择的标识是否有效)

After installing Xcode 4.3 I can't validate and distribute application using Organizer. While building, signing and validating in Xcode is OK, the validation in Organizer fails with the message in the title of this question.After installing Xcode 4.3 I can't validate and