OK, trying to compile your branch for qt4 only I get two errors: .... Application.C: In member function 'virtual bool lyx::frontend::Application::x11EventFilter(XEvent*)': Application.C:77: error: 'class lyx::frontend::GuiWorkArea' has no member named 'view' Application.C:82: error: 'class lyx::frontend::GuiWorkArea' has no member named 'view' make[7]: *** [Application.lo] Error 1 GuiWorkArea.C: In member function 'virtual void lyx::frontend::GuiWorkArea::inputMethodEvent(QInputMethodEvent*)': GuiWorkArea.C:606: error: 'class QInputMethodEvent' has no member named 'text' ...
-- José Abílio