The latest Pew poll shows a big turnaround for Kerry among white Catholics. I really don't like Pew's focus on only "white" religious voters. I can think of a few reasons why they do it, but it nonetheless provides an incorrect picture of the sentiment of religious voters.
The other problem with these polls is that while the subgroup results are interesting, they truly do have margin of error problems. So, "big swings" may just be noise. The margin of error on the white Catholic subgroup is probably about +/- 7%, so one should never take them too seriously.
