comparison of Time with -279519369 failed (ArgumentError) /usr/local/httpd/htdocs/mini/diary/tdiary.rb:1447:in `<' /usr/local/httpd/htdocs/mini/diary/tdiary.rb:1447:in `last_modified' /usr/local/httpd/htdocs/mini/diary/tdiary.rb:1445:in `last_modified' /usr/local/httpd/htdocs/mini/diary/index.rb:59