Gray boxes with question marks

When I find some PDF files, a grey box with a red question mark inside appears. I can't move, modify or delete these boxes. I searched on the web and most of the responses indicated that these boxes indicate corrupted images, but my documents have no images. Mine appear at the beginning and end of text blocks. They do not appear in the thumbnail view. I am running Acrobat Professional, version 8.1.

What are these boxes and how do I get rid of them?

A screenshot of what I see is attached.

Robert

grey box.GIF

A little more information, to ensure the excellent diagnostic monitoring.

When Acrobat opens a PDF file and it finds the annotations of an unknown type it shows these boxes. How have to disappear (or anything else) is to install a plug-in of specific designed to show them.

Older versions of Acrobat just show nothing at all.

Acrobat 5 would show nothing.

Acrobat 7 would show the boxes.

Tags: Acrobat

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