I accidentally stumbled upon this thread. It seems I stopped receiving mobileread notifications. You could have attracted my attention through issues on
kterm github page.
From the thread I gather that the problem is related to matchbox-keyboard, because it links to libpng. Kterm itself should not be affected.
I rebuilt matchbox-keyboard with libpng16. I hope it will solve the problem (unless I spoilt something else). Maybe someone could test the new binary. If it is ok, I could make new package for kterm.
Greetings to all!
UPDATE: New tested package for firmware 5.6.5 and above is on the kterm page.