Mupdf's title bar does not show anything on my system (mipsel linux built with openembedded). I assume this is because I'm using Xfbdev, but it could be something else. I tried two different window managers and got the same "unnamed window" behaviour. In any event, something on my system doesn't recognise WM_LOCALE_NAME and needs WM_NAME. diff --git a/apps/x11_main.c b/apps/x11_main.c index 395f9fd..c045863 100644 --- a/apps/x11_main.c +++ b/apps/x11_main.c @@ -198,6 +198,7 @@ void wincursor(pdfapp_t *app, int curs) void wintitle(pdfapp_t *app, char *s) { + XStoreName(xdpy, xwin, s); #ifdef X_HAVE_UTF8_STRING Xutf8SetWMProperties(xdpy, xwin, s, s, nil, 0, nil, nil, nil); #else