Saving to .png strips metadata

In Photoshop CS6, when you save an open file to .psd, .tif, or .jpg,
whatever metadata it contains is saved with the file, and you can examine it in Bridge.
But when you save to .png, the metadata panel in Bridge is empty — there’s nothing there!
Is this a bug or a feature?

CS6 does store metadata in a png file and it is readable in Bridge. For that to happen, however, you have to make sure that the SFW dialog has its metadata box not set to None. Set it to one of the other choices to match your needs.
The metadata in the png file does not show up, unfortunately, in the File Info ... box within Photoshop. It should.
Paulo

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