Yeah same here, I once was busy with a neat template, and then I closed it accidentally instead of a other document. But thats why I have a punching bag in my room
it does have a window before closing. but i always mix the document im working on with a stock that i want to close. so i press "no" and then it closes. and then i realize
OK I'm too impatient to save EVERY new layer, but I do save every five or so... this happened to me for the first time yesterday...got a render and a sig mixed up before saving and lost my sig ;(