Sometimes it happens that the indicators of programs in icons-only task manager are broken and look inverted. See following image for an example: http://s14.directupload.net/images/141026/r7iqydwl.png Reproducible: Couldn't Reproduce Steps to Reproduce: Could not reproduce it, it sometimes happens. Could be connected to the problem of icons disappearing. I'm using Nvidia 343 from xorg-edgers ppa, compositor is set to OpenGL 3.1 (GLX), but I remember to have this problem before setting compositor to OpenGL 3.1.
I'm not seeing a problem on your screenshot. The greyed-out icons are minimized windows.
(In reply to Eike Hein from comment #1) > I'm not seeing a problem on your screenshot. The greyed-out icons are > minimized windows. Look at the triangle/arrow. It's pointing downwards and is at the center of the icon. They usually are at the bottom of the icon and pointing upwards.
I seem to reproduce this bug.. it happens when moving panel sometimes.
Created attachment 92821 [details] Wrong grouping indicator position on a vertical taskbar This seems to be the same bug. If you look at the left side, you can see the broad side of the triangle, the point being off screen.
The grouping icons are now plus signs and they always appear in the right place for me with a vertical Icons-Only Task manager; can anyone still reproduce this with a more recent version of Plasma (5.9.x+)?
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Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!