How can I rename a folder in Lion's Launchpad?

Question

I created a folder by dropping one icon on top of another.

Now I want to rename that folder, since the default name, "Utility" isn't the one I want.

According to all advice I find on the internet, I should open the folder and then double-click the title in order to rename it.

But, when I double-click the title, nothing is happening. Is there a lock somewhere I have to turn off?

This is what I tried:

• Double-Clicking
• Right-Clicking
• Ctrl-Clicking
• Option-Clicking
• Command-Clicking

What else?