I already answered this question in the Arch Linux ARM forum, but wanted to provide the answer here for future readers.
ArchLinuxArm has switched to the new mainline uBoot (away from Jeff's uBoot). The new mainline uboot (2014.04.R4-1) installation script doesn't properly set back the default MTD partition layout for the E02.
The default partition layout for E02 is the follow:
mtdparts=mtdparts=orion_nand:1M(u-boot),4M(uImage),32M(rootfs),-(data)
The mtd partition is configuration via the "mtdparts" uBoot environment variable.
#see the current layout
fw_printenv mtdparts
#set it back to the default
fw_setenv mtdparts 'mtdparts=orion_nand:1M(u-boot),4M(uImage),32M(rootfs),-(data)'
reboot and install the rescue env.
For reference:
http://archlinuxarm.org/forum/viewtopic.php?f=53&t=7573