Hi Steve,
Thank you! Great catch. On my first try I downloaded a 1.2.3 nanobsd image in order to match my old configuration file (it wouldn't boot), but on the second, somehow I managed to download the memstick version instead of nanobsd. I went back and downloaded pfSense-2.1.5-RELEASE-4g-i386-nanobsd-vga.img, installed it, restored my configuration, and I am much much happier.
Regards,
Rich