Another review was published by Roger Friedman. Also some information about her bandage on her hand and for the Q&A in the Apple store in Soho. This is what it says about it:
While cutting through an avocado she sliced open her hand, doing quite quite a bit of damage. A local doctor in Connecticut sewed it up but then Streep headed back into New York for hand surgery. “They gave me an even bigger bandage,” she told me after the Q&A, which also included co-stars Tommy Lee Jones and Steve Carell, and director David Frankel. “And of course I took it right off when I got home. But now,” she said, eyeing her unstable hand warily, “I think I’ll put it back on.”
The movie review you can read here.