I just did it. Being an old-time macuser, I could replace this lib. Quick after that I got a yellow banner saying something like "Internal error. Phone application will be closed" (in Russian).
Widget works perfectly as before PR1.2.

Quick dial *100# in the Phone dialpad brought no result at all. (expected outcome: This new modal window bringing the result of USSD query). It just shows up window "making a query" with yellow puck going left-right-left in the progress bar. And then it goes back as if I did no query at all.

Rebooting didn't help.

Is it OK? I would prefer the widget and an optional "manual" query in the dialpad to live separately and independently.