--- rxvt-unicode/src/screen.C	2013/02/16 17:26:53	1.434
+++ rxvt-unicode/src/screen.C	2013/03/24 10:12:04	1.435
@@ -293,9 +293,14 @@
        * add or delete rows as appropriate
        */
 
+      int common_col = min (prev_ncol, ncol);
+
       for (int row = min (nrow, prev_nrow); row--; )
         {
-          copy_line (drawn_buf [row], prev_drawn_buf [row]);
+          scr_blank_screen_mem (drawn_buf [row], DEFAULT_RSTYLE);
+          memcpy (drawn_buf [row].t, prev_drawn_buf [row].t, sizeof (text_t) * common_col);
+          memcpy (drawn_buf [row].r, prev_drawn_buf [row].r, sizeof (rend_t) * common_col);
+
           copy_line (swap_buf [row], prev_swap_buf [row]);
         }