1st January 2017, 4:38
Not that i thought it would fix this persistent kwallet bug, but to cure a raft of annoying other hassles caused (i suspect] by my original decision months ago to convert my Tower from Mint 17 KDE4 to Maui but reusing its encrypted /home partition, yesterday i rebuilt Tower with a complete SSD format & clean-install of Maui. I know that this won't solve the kwallet problem, but i also realise now that there seems to be no solution available for me, so for housekeeping reasons i'll now mark this thread Closed [though not Solved].