Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 11710)
+++ wp-admin/includes/schema.php	(working copy)
@@ -61,8 +61,8 @@
   comment_author_email varchar(100) NOT NULL default '',
   comment_author_url varchar(200) NOT NULL default '',
   comment_author_IP varchar(100) NOT NULL default '',
-  comment_date datetime NOT NULL default '0000-00-00 00:00:00',
-  comment_date_gmt datetime NOT NULL default '0000-00-00 00:00:00',
+  comment_date datetime NOT NULL default '1970-01-01 00:00:00',
+  comment_date_gmt datetime NOT NULL default '1970-01-01 00:00:00',
   comment_content text NOT NULL,
   comment_karma int(11) NOT NULL default '0',
   comment_approved varchar(20) NOT NULL default '1',
@@ -86,7 +86,7 @@
   link_visible varchar(20) NOT NULL default 'Y',
   link_owner bigint(20) unsigned NOT NULL default '1',
   link_rating int(11) NOT NULL default '0',
-  link_updated datetime NOT NULL default '0000-00-00 00:00:00',
+  link_updated datetime NOT NULL default '1970-01-01 00:00:00',
   link_rel varchar(255) NOT NULL default '',
   link_notes mediumtext NOT NULL,
   link_rss varchar(255) NOT NULL default '',
@@ -114,8 +114,8 @@
 CREATE TABLE $wpdb->posts (
   ID bigint(20) unsigned NOT NULL auto_increment,
   post_author bigint(20) unsigned NOT NULL default '0',
-  post_date datetime NOT NULL default '0000-00-00 00:00:00',
-  post_date_gmt datetime NOT NULL default '0000-00-00 00:00:00',
+  post_date datetime NOT NULL default '1970-01-01 00:00:00',
+  post_date_gmt datetime NOT NULL default '1970-01-01 00:00:00',
   post_content longtext NOT NULL,
   post_title text NOT NULL,
   post_excerpt text NOT NULL,
@@ -126,8 +126,8 @@
   post_name varchar(200) NOT NULL default '',
   to_ping text NOT NULL,
   pinged text NOT NULL,
-  post_modified datetime NOT NULL default '0000-00-00 00:00:00',
-  post_modified_gmt datetime NOT NULL default '0000-00-00 00:00:00',
+  post_modified datetime NOT NULL default '1970-01-01 00:00:00',
+  post_modified_gmt datetime NOT NULL default '1970-01-01 00:00:00',
   post_content_filtered text NOT NULL,
   post_parent bigint(20) unsigned NOT NULL default '0',
   guid varchar(255) NOT NULL default '',
@@ -147,7 +147,7 @@
   user_nicename varchar(50) NOT NULL default '',
   user_email varchar(100) NOT NULL default '',
   user_url varchar(100) NOT NULL default '',
-  user_registered datetime NOT NULL default '0000-00-00 00:00:00',
+  user_registered datetime NOT NULL default '1970-01-01 00:00:00',
   user_activation_key varchar(60) NOT NULL default '',
   user_status int(11) NOT NULL default '0',
   display_name varchar(250) NOT NULL default '',