Google Docs Viewer removes watermarks from pdfs?

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Feb 10, 2013, 11:31:39 PM2/10/13

to science-libe...@googlegroups.com, Bryan Bishop

Does anyone have some insight into what Google is doing to remove watermarks?

For instance, this server applies a watermark to a pdf:

But when you view it through Google's proxy, it's not present:

You can generate these urls from this page:

It seems to use 74.125.178.17 instead of the googlebot ip addresses.

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