Created attachment 134803 [details] picture Everything from master See attached picture
It seems to only be present when a toolbar is enabled. If only the menu bar is present, the line isn't there.
It seems to be using the window background color. Kate and Dolphin also have the extra line of pixels below the header line when a toolbar is enabled, but it doesn't look like a bug then because it blends in.
I see the same in Okular and in Gwenview. Has that something to do with the contentsMargins thing?
Yes, that's where the tools area border is going to be drawn.
Created attachment 135395 [details] Gwenview
Created attachment 135396 [details] Okular
Created attachment 135397 [details] Current Konsole
(In reply to Jan Blackquill (Carson Black) from comment #4) > Yes, that's where the tools area border is going to be drawn. I added some pictures that show that the white line actually shows up beneath the border.
Yeah this isn't a problem in the case where the pixel below the line matches the view background, but it shows up as a bright line in cases when it doesn't. We should fix this. Preferably before the final release.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/breeze/-/merge_requests/77
Git commit 4f844aef09c8e7c5e689a9070a5bfb3d9cb4c3b2 by Jan Blackquill. Committed on 04/02/2021 at 02:50. Pushed by cblack into branch 'master'. kstyle: expand tools area 1px downwards if present Border shenanigans mean that the tools area is 1px less than it should be. Incrementing it fixes this. M +3 -0 kstyle/breezetoolsareamanager.cpp https://invent.kde.org/plasma/breeze/commit/4f844aef09c8e7c5e689a9070a5bfb3d9cb4c3b2
Git commit ec08c8415e9f1425dff7cc11a8aed73d48bd722e by Jan Blackquill. Committed on 04/02/2021 at 02:54. Pushed by cblack into branch 'Plasma/5.21'. kstyle: expand tools area 1px downwards if present Border shenanigans mean that the tools area is 1px less than it should be. Incrementing it fixes this. M +3 -0 kstyle/breezetoolsareamanager.cpp https://invent.kde.org/plasma/breeze/commit/ec08c8415e9f1425dff7cc11a8aed73d48bd722e