https://bugs.kde.org/show_bug.cgi?id=417629
--- Comment #2 from karo...@gmail.com --- Yes, I installed some new themes recently from internet (via the KDE 'downloader'). It was OK until today, this morning I was playing with other themes and all windows lost correct decorations and instead there was just a black border. To restore I have removed some of KDE settings related to themes (from ~/.config) and all is OK now. Not sure what exactly has happened but clearly you can break your KDE Desktop via System Settings by just changing and adding themes from internet. I have the old broken config backed up in case you are interested investigating it further. Otherwise please close the ticket. -- You are receiving this mail because: You are watching all bug changes.