diff --git a/7.3.066 b/7.3.066
new file mode 100644
index 0000000..f4a6fd0
--- /dev/null
+++ b/7.3.066
@@ -0,0 +1,90 @@
+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.066
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.066
+Problem:    Crash when changing to another window while in a :vimgrep command.
+	    (Christian Brabandt)
+Solution:   When wiping out the dummy before, remove it from aucmd_win.
+Files:	    src/quickfix.c
+
+
+*** ../vim-7.3.065/src/quickfix.c	2010-09-21 16:56:29.000000000 +0200
+--- src/quickfix.c	2010-11-24 16:27:40.000000000 +0100
+***************
+*** 3432,3437 ****
+--- 3432,3438 ----
+      char_u	*fname;
+  {
+      buf_T	*newbuf;
++     buf_T	*newbuf_to_wipe = NULL;
+      int		failed = TRUE;
+      aco_save_T	aco;
+  
+***************
+*** 3468,3482 ****
+  	    failed = FALSE;
+  	    if (curbuf != newbuf)
+  	    {
+! 		/* Bloody autocommands changed the buffer! */
+! 		if (buf_valid(newbuf))
+! 		    wipe_buffer(newbuf, FALSE);
+  		newbuf = curbuf;
+  	    }
+  	}
+  
+  	/* restore curwin/curbuf and a few other things */
+  	aucmd_restbuf(&aco);
+      }
+  
+      if (!buf_valid(newbuf))
+--- 3469,3487 ----
+  	    failed = FALSE;
+  	    if (curbuf != newbuf)
+  	    {
+! 		/* Bloody autocommands changed the buffer!  Can happen when
+! 		 * using netrw and editing a remote file.  Use the current
+! 		 * buffer instead, delete the dummy one after restoring the
+! 		 * window stuff. */
+! 		newbuf_to_wipe = newbuf;
+  		newbuf = curbuf;
+  	    }
+  	}
+  
+  	/* restore curwin/curbuf and a few other things */
+  	aucmd_restbuf(&aco);
++ 	if (newbuf_to_wipe != NULL && buf_valid(newbuf_to_wipe))
++ 	    wipe_buffer(newbuf_to_wipe, FALSE);
+      }
+  
+      if (!buf_valid(newbuf))
+*** ../vim-7.3.065/src/version.c	2010-11-24 15:50:54.000000000 +0100
+--- src/version.c	2010-11-24 16:30:44.000000000 +0100
+***************
+*** 716,717 ****
+--- 716,719 ----
+  {   /* Add new patch number below this line */
++ /**/
++     66,
+  /**/
+
+-- 
+CART DRIVER: Bring out your dead!
+   We follow the cart through a wretched, impoverished plague-ridden village.
+   A few starved mongrels run about in the mud scavenging.  In the open
+   doorway of one house perhaps we jug glimpse a pair of legs dangling from
+   the ceiling.  In another doorway an OLD WOMAN is beating a cat against a
+   wall rather like one does with a mat.  The cart passes round a dead donkey
+   or cow in the mud.  And a MAN tied to a cart is being hammered to death by
+   four NUNS with huge mallets.
+                 "Monty Python and the Holy Grail" PYTHON (MONTY) PICTURES LTD
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\  an exciting new programming language -- http://www.Zimbu.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///