It seems it has been fixed upstream: https://bugs.kde.org/show_bug.cgi?id=438632
- Bug#992657: kio: Invalid escape sequence in /us... Francois Marier
- Bug#992657: kio: Invalid escape sequence i... Angel Aguilera
- Processed: Bug#992657 marked as pending in... Debian Bug Tracking System
- Bug#992657: marked as done (kio: Invalid e... Debian Bug Tracking System
