CS6. This is the 2nd time it's happened. Last time was 2 months ago. So it's a repeatable event with a time interval.
I was doing a large amount of clone stamping. I then needed to delete a dozen or so prior edits from the history tab. But not all the prior edits were IN the history tab. When I deleted the only available remaining edit in the history tab (delete state "clone stamp"?) the program removed ALL of my previous edits, ie; hue/saturation, crop, noise reduction, healing brush etc...
1 hours work gone in a single click. This of course was not my desired intent.
Perhaps the history tab can only contain a limited number of edits in its que? But why then is the name of the "state" to be deteted, mislabeled?
I was not working with layers or masks, just one single JPEG pic.
And no other programs were running on my MAC which is running with the latest updates.