Many times when I download a PDF from various websites (example: from San Francisco city departments) on my android phone, the mobile Acrobat app reports that the document can't be opened because it is corrupt or damaged. This error occurs too often to be true, and many times I'll transfer the pdf that I downloaded to my computer and the desktop Acrobat app opens the doc just fine. So please, do something. It's getting to the point where I can't open any PDFs on my phone. I'm attaching a PDF that generated the error today. Hopefully you can analyze it and solve this crazy mystery. Thank you!