Based on some emails between myself and Plustek, it's an issue with a not-to-spec component that was provided by a supplier. I suspect I have a unit that's affected by this issue, though I haven't gotten specific confirmation that my issue is related to this new announcement. But I can read between the lines.
I hope that Plustek knows the S/N's of the affected units so they can do some sort of proactive repair/replacement once the component issue is sorted out....
--Greg