diff -urpN rdesktop-1.5.0-orig/xwin.c rdesktop-1.5.0/xwin.c
--- rdesktop-1.5.0-orig/xwin.c	2007-01-17 12:01:18.000000000 +0100
+++ rdesktop-1.5.0/xwin.c	2007-01-17 12:05:02.000000000 +0100
@@ -1461,7 +1461,7 @@ select_visual(int screen_num)
 		}
 
 		/* we use a colourmap, so the default visual should do */
-		g_owncolmap = True;
+//		g_owncolmap = True;
 		g_visual = vmatches[0].visual;
 		g_depth = vmatches[0].depth;
 	}
@@ -1568,7 +1568,7 @@ ui_init(void)
 	{
 		g_xcolmap =
 			XCreateColormap(g_display, RootWindowOfScreen(g_screen), g_visual,
-					AllocNone);
+					(g_depth <= 8) ? AllocAll : AllocNone);
 		if (g_depth <= 8)
 			warning("Display colour depth is %d bit: you may want to use -C for a private colourmap.\n", g_depth);
 	}