In Exercise or Learning mode, try open configuration dialog using menu: Setting -> Configure Kbruch Reproducible: Always KBruch 5.0 Kubuntu 15.04 with Plasma 5.3.1, Frameworks 5.9
Confirmed in recent master compiled from sources
Git commit 697d042ca19f15e1fec0cea6325cef21be83c0f1 by Luigi Toscano. Committed on 26/09/2015 at 23:33. Pushed by ltoscano into branch 'Applications/15.08'. Restore slot definition Otherwise at least old type connection (like KStandardActions) do not work and a warning is printed. FIXED-IN: 15.08.2 REVIEW: 125406 M +3 -0 src/FractionRingWidget.h M +3 -0 src/MainQtWidget.h http://commits.kde.org/kbruch/697d042ca19f15e1fec0cea6325cef21be83c0f1