[Plugin: WP Dummy Content] Fatal error

I installed it, set some reasonable settings and hit the engage button. This is what I got:

Fatal error: Uncaught exception ‘Exception’ with message ‘DateTime::__construct() [datetime.–construct]: Failed to parse time string (1286985876) at position 8 (7): Unexpected character’ in /home4/erinhyde/public_html/store/wp-includes/formatting.php:1582 Stack trace: #0 /home4/erinhyde/public_html/store/wp-includes/formatting.php(1582): DateTime->__construct(‘1286985876’) #1 /home4/erinhyde/public_html/store/wp-content/plugins/wp-dummy-content/lib.php(294): get_gmt_from_date() #2 /home4/erinhyde/public_html/store/wp-content/plugins/wp-dummy-content/lib.php(251): insert_post(1286985876) #3 /home4/erinhyde/public_html/store/wp-content/plugins/wp-dummy-content/wp-dummy-content.php(42): create_blog_stuff(‘Mississippi Riv…’, ‘SATURDAY mornin…’, ‘-1’, 1286985876, ‘publish’, Array) #4 /home4/erinhyde/public_html/store/wp-includes/plugin.php(395): dummy_content_admin(Array) #5 /home4/erinhyde/public_html/store/wp-admin/admin.php(138): do_action(”) #6 /home4/erinhyde/public_html/store/wp-a in /home4/erinhyde/public_html/store/wp-includes/formatting.php on line 1582