Version: (using KDE Devel) Installed from: Compiled sources OS: Linux with the B2 theme, if a window has no title, it cannot be dragged around by its titlebar, since there is no space there to click on. I have a workaround, which is to add some spacers around the title, but it needs the attached patch. I use it regularly, and does seem to improve things for me.
Created attachment 1433 [details] Patch to enable spacers in b2 theme. If this patch were applied, it would close the bug reported, as far as I am concerned.
I've fixed this specific problem by simply limiting the minimum width of the title area. But the patch was right too, there was missing support for spacers. Thanks.