--- xprop.c.orig	2008-03-08 09:22:32.000000000 +1100
+++ xprop.c	2008-05-30 10:37:36.000000000 +1000
@@ -1738,6 +1738,7 @@
 	XEvent event;
 	const char *format, *dformat;
 	
+	fflush(stdout);
 	XSelectInput(dpy, target_win, PropertyChangeMask);
 	for (;;) {
 	    XNextEvent(dpy, &event);
@@ -1753,6 +1754,7 @@
 		dformat = props[i].dformat;
 	    }
 	    Show_Prop(format, dformat, Format_Atom(event.xproperty.atom));
+		fflush(stdout);
 	}
     }
     exit (0);