Win 7 and Adobe Acrobat 8 Professional

I have a user with win 7 and adobe acrobat 8 pro and in the digital signature on the PDF, it has a question mark and a pick of a person over it on the left hand side.  I have reimaged the machine, recreated the signature, same thing.  Logged onto his computer as me, so a different profile, and it does the same thing.  Emailed it to me on my computer and it works fine.  No pics on the signature line.  Anybody ever seen this?