diff -u nano/winio.c nano-editrefresh/winio.c
--- nano/winio.c	Thu Jan 23 16:02:23 2003
+++ nano-editrefresh/winio.c	Sun Jan 26 12:32:25 2003
@@ -1093,7 +1093,8 @@
     if (edittop == NULL)
 	edittop = current;
 
-    if (current->lineno >= edittop->lineno + editwinrows)
+    if (current->lineno < edittop->lineno ||
+	    current->lineno >= edittop->lineno + editwinrows)
 	/* Note that edit_update() changes edittop so that
 	 * current->lineno = edittop->lineno + editwinrows / 2.  Thus
 	 * when it then calls edit_refresh(), there is no danger of