Thanks Leonard... Here's the thing: I know via "Convert Colors" work perfectly... But we want to make a "Droplet" using the standard "Convert to grayscale" FixUp locate in Acrobat 8. Is there sometime that I miss to check? In this url [url=http://www.imaginecr.com/fixups]http://www.imaginecr.com/fixups[/url] you can locate a PDF (my test) and some screenshots of the issue. And I tried with different PDF's but doesn't work.
Leonard
Leonard Rosenthol
PDF Standards Architect
Adobe Systems