I use a French keyboard layout, and Ctrl+Alt+M to vertically maximize a window. I have to press Ctrl+Alt+, since 'M' is at the ',' location on a qwerty keyboard. Reproducible: Always Steps to Reproduce: 1. I use a French keyboard layout and KDE in French. 2. In KDE->Configuration->SystemConfiguration window, in Shortcuts->KeyboardGlobalShortcuts with KDE Components set to kwin, I set Ctrl+Alt+M to vertically maximize any window. It recognize the 'M' of the French layout. 3. Have to press Ctrl+Alt+',' to get my Ctrl+Alt+M shortcut.
Please report this upstream. This seems not a packaging issue.