--- /dev/null
+Index: src/libgdl/gdl-dock-master.c
+===================================================================
+--- src/libgdl/gdl-dock-master.c (revision 20065)
++++ src/libgdl/gdl-dock-master.c (working copy)
+@@ -650,7 +650,11 @@
+
+ #ifdef WIN32
+ GdkLineStyle lineStyle = GDK_LINE_ON_OFF_DASH;
++#if 0
+ if (is_os_vista())
++#else /* RWMJ - missing */
++ if (0)
++#endif
+ {
+ // On Vista the dash-line is increadibly slow to draw, it takes several minutes to draw the tracking lines
+ // With GDK_LINE_SOLID it is parts of a second