https://bugs.kde.org/show_bug.cgi?id=451778
--- Comment #9 from Paul McAuley <k...@paulmcauley.com> --- I have reworked my C++ window decoration to use the new setBlurRegion API (due 5.25) on the branch at https://github.com/paulmcauley/classik/tree/kornerbug-fix-plasma5.25 This has worked around this issue for my specific case for now. I had to remove the blur config line entirely from the .json file and also match the Breeze behaviour of setting setOpaque(false) for non-maximized windows (even when I know that no transparency will be used in the window decoration) to avoid any artefacts. However, it would be good to get some guidance on what setOpaque() is for. Should a non-maximized window ever have setOpaque(true) set if transparency is never going to be used in the window decoration? I would have assumed this would be the case, and therefore that this bug is still generally relevant. -- You are receiving this mail because: You are watching all bug changes.