Index: wp-admin/includes/post.php
===================================================================
--- wp-admin/includes/post.php	(revision 8245)
+++ wp-admin/includes/post.php	(working copy)
@@ -93,7 +93,10 @@
 		$hh = $_POST['hh'];
 		$mn = $_POST['mn'];
 		$ss = $_POST['ss'];
+		$aa = ($aa <= 0 ) ? date('Y') : $aa;
+		$mm = ($mm <= 0 ) ? date('n') : $mm;
 		$jj = ($jj > 31 ) ? 31 : $jj;
+		$jj = ($jj <= 0 ) ? date('j') : $jj;
 		$hh = ($hh > 23 ) ? $hh -24 : $hh;
 		$mn = ($mn > 59 ) ? $mn -60 : $mn;
 		$ss = ($ss > 59 ) ? $ss -60 : $ss;