EA4500 and E4200 Unable to update!

I picked up a second router an old E4200 to see if there was a flash problem with my EA4500. I am unable to upgrade the primary partition without failing and rebooting back to the alt partition with any new builds. Downloading from the snapshot archive fails on install, and self installs which I have been doing since this router was supported now fail. Is there a complier setting that needs to be changed or has the layout of the partitions changed?