My advice is usually to IGNORE something like this, as the others have said, OR to acknowledge HEARING it . . . but without trying to SOLVE it in any way.
"Sorry to hear about your sh*tstorm, (Wife). Knowing you you'll get it all figured out, I'm sure."
(or something similar)
The concept of it is the same as leaving a nickel tip at a restaurant where you got cr*ppy service, rather than leaving NOTHING. If you leave NOTHING, they think you may have just forgotten, whereas the nickel sends a clearer message. In this case, it may be stronger to actually validate having HEARD her problem, and saying something that indicates that YOU are not going to solve it.
Just a thought. I'm certainly fine with "ignore," too.
