Unfortunately, my solution was to completely re-flash the device.

However, the up side of that event is that my tablet runs much more reliably now, as I have installed NO software from the development repository.

If you decide to reflash, be sure to make backups to the removable microSD card, or otherwise store the backup outside the device's ,main storage, as I had to flash not just the root fs, but the remainder of the internal memory as well.