Hello,
We've just come across a weird issue when viewing signed documents containing embedded files in Adobe Reader. If we use the 'Click to view this version' link in the Signatures panel, the embedded files are not shown in the Attachments panel, even though they are covered by the signature.
I've uploaded a sample document that illustrates the issue to Google Drive, here is the link: https://drive.google.com/file/d/0B1wk9toh5e7AZVBIb2V6a2lDMWM/view?usp=sharing
Thanks,
Ken