I tried to reproduce this and couldn't. Can you reproduce it consistently?
Saying that, I don't think there's really much we could do here. Generally, that image is just the data we'rd receiving. At best, we may resize the image, but we're not actually pulling it out of the clipboard through our code -- the clipboard data is mostly coming from the browser, which would generally be getting its data from whatever app put it in the clipboard. I'd be curious what would happen if you pasted the image into something like Photoshop or saved the image to a PNG and compared it against the version pasted into the browser.