Peter77sx wrote:What about leaving the posting page accidently, come back and it's gone. does it prevent this too?
Nope. Personally, I think that's the kind of feature that'd be more appropriate in the browser.
Firefox, for instance, saves tabs. If your browser cashes, you can restore all your tabs. Similarly, it seems like the browser ought to save the contents of a textarea prior to leaving the page, be it because you closed a tab or because you hit the Back button or whatever.
Kinda like with spellcheck, actually. You could add it to a board such that it'd work with IE, Firefox, or whatever browser, or you could just install Firefox, and have spell checking on every board, regardless of whether or not the software has in-built support for it.