How to recover an older version of a Photoshop doc?

[DevinNight]

If you are using time machine it does a backup every couple hours, so you can get previous versions that way.
As a habit I save my file with a different name ever couple hours, just in case a file gets corrupted.
I've done what you have done though. You might try making the file the larger pixel dimension to see how much it was degraded, I've been pretty impressed with how well PS rescales images, even from lo- to high res.
Sorry I don't know of any cure.

[Chashio]

You might try making the file the larger pixel dimension to see how much it was degraded, I've been pretty impressed with how well PS rescales images, even from lo- to high res.

Me too. Or you could try this: http://www.ononesoftware.com/product...FQlN4AodSkkY0g I haven't tried it myself, yet, but you could give the free trial a spin and see what happens. I'd be curious to see the before and after if you do.