A friend of mine has a Gmail problem. I don't use Gmail so I rapidly ran out of ideas and wasn't able to help her.
The issue is with printing document attachments. Images work OK. She clicks the image attachment and it brings up a preview. She then clicks the print icon and gets the google print/preview dialog. So far, so hoopy. With a document (.docx) she clicks and gets the preview, but when she clicks the print icon, all she gets is a blank tab - no printing stuff at all. I'm guessing it is some sort of file association issue. She uses LibreOffice, which did make me a bit suspicious (not of LibreOffice, but the fact she was "non-standard"). I didn't try any other file types (.xlsx for instance).
She is also on Windows 8.1, believe it or not, but that is a whole separate conversation I have to have.
Ideas, anyone?
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