We're currently tracking a few reports of something similar, and trying to find out exactly what might be causing it. For now, you can still create an image of your document the old fashioned way, with a screenshot. To help us find the root cause though, if you could send us the original copy of the pdf you're using, we can pass that on to the engineering team for them to look at when they're tracking down the problem. Just send that as an attachment to socialsupport(at)constantcontact(dot)com with a reference to this post, and we'll get that attached to the ongoing investigation for you.
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