In Xcode 4.1, how to change the name of 'New Group'?

When I add a 'New Group' to a project with Xcod开发者_开发问答e 4.1, I can not change the name of the group. Is it a bug?

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Select the group and press enter, then type your new name.

Clicking twice slowly also works.

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It works the same way as files and directories in Finder. First select the group, then hit your carriage return key. You can then edit the group name.