When maximizing the application window in Mint 17.3 KDE edition, the title bar goes a few pixels beyond the topmost screen/desktop edge. Qt4 bug? Can't test on Qt5 to really tell. Reproducible: Always Steps to Reproduce: 1. Laumch Krita 3.0 beta 2. Maximize window 3. Top edge goes out of bounds Actual Results: Top application title bar goes several pixels out of bounds. Expected Results: All application edges should respect the desktop boundaries on maximize.
It's a bug in Qt that happens when the left-hand toolbox is too high. If you make it wider, then reset the window size it'll fit again.
Upstream problem, sadly :/