[Plugin: WP Dummy Content] Error msg when using plugin: "Fatal error: Uncaught exception…&quo

Get the following error when using the WP Dummy Content plugin:
Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct() [<a href='function.DateTime---construct'>function.DateTime---construct</a>]: Failed to parse time string (1289586791) at position 8 (9): Unexpected character' in /home/mysite/public_html/nswd2/wp-includes/formatting.php:1582 Stack trace: #0 /home/mysite/public_html/nswd2/wp-includes/formatting.php(1582): DateTime->__construct('1289586791') #1 /home/mysite/public_html/nswd2/wp-content/plugins/wp-dummy-content/lib.php(122): get_gmt_from_date(1289586791) #2 /home/mysite/public_html/nswd2/wp-content/plugins/wp-dummy-content/lib.php(32): insert_page('Duke and the Ki...', 'He worshipped t...', 0, 'default', 'publish', Array) #3 /home/mysite/public_html/nswd2/wp-content/plugins/wp-dummy-content/wp-dummy-content.php(37): create_stuff(Array) #4 [internal function]: dummy_content_admin('') #5 /home/mysite/public_html/nswd2/wp-includes/plugin.php(395): call_user_func_array('dummy_content_a...', Array) #6 /home/mysite/public_ in /home/mysite/public_html/nswd2/wp-includes/formatting.php on line 1582