I recently started using Evernote Premium. I noticed that xlsx (excel) attachments are blank. Quickview brings them up until you close that view. But the large file area is blank. The attachment appears for a moment when first attached then vanishes leaving blank space. If I resize the window even a millimeter the file appears and is usable. I am on a mac desktop with latest update for osx and evernote. I believe this is a bug but I don't see a formal bug report area on any web site.