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Have a document open with no background. The transparency grid is gone and is all black instead. What happened?
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Have a document open with no background. The transparency grid is gone and is all black instead. What happened?
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Try checking Edit » Preferences » Transparency & Gamut.
#ffffff
#cccccc
Or maybe you created a new document and in the 'New Document Window' you have the Background Contents set to Black or Background color.
You're a bit sparse on detail. What file format is your document? Does it contain layers? What happens if you create a new transparent image in Photoshop - does it behave normally? – Mike Fitzpatrick – 2011-10-05T21:45:36.993