http://bugs.winehq.org/show_bug.cgi?id=12514
--- Comment #3 from Austin English austinenglish@gmail.com 2008-04-11 21:21:43 --- (In reply to comment #2)
You may be correct. I tested this with a jpeg image and the pdf is created successfully.
Is this still a bug? Perhaps Acrobat Pro relies on some sort of Windows feature for this and not MS Office.
Install it in a clean windows install without MS office and see if it works. If so, yes, it's a valid bug, if not, invalid. I'm leaning towards the latter.