Weird error while uploading a PNG image.
For security reasons, framing is not allowed. Click OK to remove frames.
I'm just reporting this, I don't know what it means but for the context, in case it's helpful to SE:
I was uploading a PNG image.
The image is 2500px x 1400px, not significantly huge.
I can view the image just fine, but it does consistently draw this error on upload.
The error is triggered after the image has fully uploaded.