BoingBoing sez "Google has downgraded Gmail so that it no longer cracks PDFs with the no-copy-bit set".

http://www.boingboing.net/2006/05/15/gmail_downgraded_no_.html

Did they try before post?
It still works for me.

Ionut, I was here too ^^
http://blogoscoped.com/forum/31999.html ;-)

Duplicate... :)

Can you find a PDF to test this?

I can confirm this. My friend Markus send me a copy-protected PDF a while ago, while viewing it still worked. Today I get this when I try to view it as HTML:

"The attachment cannot be viewed as HTML because the author has placed restrictions on its content. Download the attachment to view it in its original format."