<i>&quot;Look what Microsoft did with </i>.odt (OpenOffice&#x2F;LibreOffice) compatibility. Now they show bogus security and compatibility warning dialogs if you open or save such a file.&quot;*<p>To be fair, oOo and LO <i>always</i> warn you when you want to save a file in MS Office format. Mind you, you can turn the notification off.<p>Food for thought: one of my employers now deploys OpenOffice as well as MS Office after years of resisting that because of fears of user confusion. Guess what? No confusion apparent.