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They say there's no such thing as a stupid question but I'll come close....Here it is:- Way back in 2000 I first noticed these rectangles superimposed over the first letter of each word of text on a CD which had a video editing programme on it. I've had no other issues with Adobe until a week ago when I purchased another CD this time a car repair manual and lo and behold, there's the little rectangles on some of the 300 pages. It's probably a well known issue...except by me.
can you determine what application created the PDF? Also, under the Fonts Tab in the same menu does it list all fonts as embedded?
Lori Kassuba is an AUC Expert and Community Manager for AcrobatUsers.com.