That is weird, since I did this exact thing and tested it, and didn't seem to see any differences in the output plots from scripts.py. Maybe there is something wrong with scripts.py...
Nathan, I'll accept this if you make one additional change. The default analysis file in that directory is scripts.py, and it sets the center to 0.5, 0.5, when now it should set it to 0,0 to match your change.
when i do this, the default output pngs look great.
I accepted along with a fix to scripts.py in 29c0bbe