I watermarked a pdf using Adobe Acrobat 9.5.5 running under Windows 7. The doc was then secured Advanced -> Security->Encrypt with Password. The permissions box was checked, a password added and the doc saved - indicating "secured". A completely different person, who did not know the password replaced the watermark using Adobe Acrobat 10.1.10 running on a Mac. Is there a known issue or a patch
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