I've had it for two days and today I lost 1/4 inch off the right side.
Screen still shows all images but with the loss of 1/4".
If it were me I'd return it.
The issue you've encountered normally occurs when you choose an optional aspect ratio, as describe on page 47 of your PowerShot ELPH 330 HS User Guide.
I'm using a 4:3 aspect ratio.
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