Quite often - least more often then I would like, I accidentally hit the 'X' on a buffer, closing it. It appears that the Open Recent list is populated from items that were last loaded though, which makes little sense as if I've just opened them - why would I want to re-open them.
It would make more sense, to me at least, if the Open Recent list was populated by files which I last saved/closed. Much like browsers "Previously closed tabs" options.
Having looked at Work 2007, it appears it works in the same way as Editra - but I still fail to see when that would be useful. Unless you're just not opening/closing files as often as I evidently do.