Cannot open .pdf file - says not supported or file is damaged... HELP! I receive PDF files on a daily basis from many different people, and never have an issue opening them. However, one of the contacts I regularly get emails from, has PDF files that I cannot open. The following dialog pops up when I attempt to open it: "Adobe Acrobat reader could not open '[filename].pdf' because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded)."I contacted the sender and made them aware of our problem. They said they send similar files to all their other contacts in the same manner and no one else has a problem with opening them. I have my acrobat reader up to date with the latest version, and my account is active. I have no idea why I cannot open the file. I did, however, try to right click on the file on the email, and it doesn't give me an option to "open with...", only to "save as..." which saves as a webpage.What is the issue here? And how can I fix it?