Permanently Disable Auto-Formatting If you're looking for a more permanent solution, Microsoft Excel allows you to disable auto-formatting for all your spreadsheets at once.

How to Enable Autosave in Excel 2007. A nightmare scenario: A power outage occurs after you've spent several hours slaving away on an Excel spreadsheet filled with important numbers and other data ...

Unless an app is updated to use the API, that application isn't using Lion's Autosave/Versions, and is instead using the standard file-handling API. If you're running Safari in the background ...