I heard today from Kindle Support. They don't know either but are going to ask Engineering to see if they do. I'll post what, if anything, they are able to find out. Kindle Support- the way customer support is supposed to work.
"...neither the weight of headstones nor our heartbreaking and vain attempts at re-creating first love would ever disallow the hold of the dead upon the quick."
Doc Voss, in Bitteroot, by James Lee Burke