$ qcad (qcad-bin:1606): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:1594:13: not a number (qcad-bin:1606): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:1594:13: Expected a string. (qcad-bin:1606): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:1977:11: not a number (qcad-bin:1606): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:1977:11: Expected a string. (qcad-bin:1606): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:2527:11: not a number (qcad-bin:1606): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:2527:11: Expected a string. (qcad-bin:1606): Gtk-WARNING **: Theme parsing error: applications.css:21:0: Expected a valid selector Fatal: Cannot mix incompatible Qt library (version 0x50905) with this library (version 0x50904) /usr/bin/qcad: line 4: 1606 Аварийный останов ./qcad-bin $@
Обнови систему целиком. Проверил - работает.