So according to Dan Wallace–
At the Society of Biblical Literature’s annual conference in Chicago last week (17–20 Nov 2012), Grant Edwards and Nick Zola presented papers on a new papyrus fragment from Romans. They have dated it to the (early) third century, which makes this perhaps only the fifth manuscript of Romans prior to the fourth (though a couple of others are usually thought to also be from the third century). This manuscript is part of the Green Collection (inventory #425). It will be published in the first volume of a new series by the Dutch academic publishing house, E. J. Brill. The series, edited by Dirk Obbink and Jerry Pattengale, is called the Green Scholars Initiative: Papyrus Series. Volume one is edited by Jeff Fish of Baylor University.
Unfortunately Brill doesn’t list it yet.
The text of the fragment is from Rom 9.18–21 and small portions of Rom 10. Edwards presented information about the paleography and provenance of the fragment, while Zola presented his findings on the textual affinities of the papyrus.
As to the heart of the matter-
The certain readings all agree with the text of NA28. In the gaps, reconstructions were necessary and there Green 425 agrees with the main Alexandrian witnesses where they are united, with a portion of them when they split.
In 9.19, it has μοι ουν, in agreement with the Alexandrians, instead of ουν μοι found in the Western and Byzantine witnesses. The second ουν of v. 19 is apparently omitted in this fragment, in agreement with א A 1739 Byz, against P46 B D F G. In 9.20 Green 425 apparently omitted μενουνγε, agreeing with P46 D F G. In 10.1 the fragment agrees with the Alexandrian and Western witnesses in reading αυτων instead of the Byzantine reading, του Ισραηλ.
So in short, the Byzantine textual tradition loses again.
Dan has other details which will be of interest to folk, so go give his considerably longer post a read.