Created attachment 9079 Screenshot showing the issue. When looking closely at the minimize and maximize buttons in the "Default" window manager theme when the window is inactive additional grey lines can be seen. I don't think this is an intentional shadow effect as they are inconsistent and are not present on the other buttons. I have provided a zoomed in screenshot showing the issue. Thanks.
Created attachment 9096 distorted unmaximize button I am experiencing the same. For maximized window especially the "unmaximize" button is distorted, see attached picture Steps to reproduce: 1) open two apps on the same desktop 2) maximize one of them 3) switch to the other one (unmaximized)
"Default-hdpi" and "Default-xhdpi" themes are ok; only "Default" is affected.
Olivier Fourdan referenced this bugreport in commit 1d0a4a95b47d6f2b524ec61bfb0ac48bb838911c themes: Fix leftover SVG overlay https://git.xfce.org/xfce/xfwm4/commit?id=1d0a4a95b47d6f2b524ec61bfb0ac48bb838911c
Can confirm that the bug is fixed with your commit. Guess this can be closed as fixed.
The bug does indeed appear to be fixed with that commit. Thanks. Closing as fixed.
Olivier Fourdan referenced this bugreport in commit e6212e62ec7cb3ea8c6aeef00917168c7272e9fa themes: Fix leftover SVG overlay https://git.xfce.org/xfce/xfwm4/commit?id=e6212e62ec7cb3ea8c6aeef00917168c7272e9fa
*** Bug 16739 has been marked as a duplicate of this bug. ***