The file format thing is true in a lot of applications. They all do something like it. Libreoffice is, unfortunately, one of them. Yes, I know that the ODT format is nicer and open and all that, but this file is a docx and the user who sent it to me is expecting a docx back. Stop complaining that I'm going to use a format you already know. At least Libreoffice has that option. Some other word processors (Apple, this means you) won't allow you to save in anything but their own format and will pull up a dialogue if you try. For someone who has the habit of saving whenever I've completed part of something, this is very annoying.