anemeth added a comment.
Here is Breeze close button modified to use `QPainter::drawRoundedRect()` and uses the same radius (3) as the titlebar: F5848210: aa.PNG <https://phabricator.kde.org/F5848210> This scales well, so I don't think it is a bug in Qt. REPOSITORY R31 Breeze REVISION DETAIL https://phabricator.kde.org/D12804 To: anemeth, #breeze, #vdg, hpereiradacosta, davidedmundson Cc: zzag, davidedmundson, ngraham, plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart