Getting a load of these. Turned off Global Redirect and they stopped.

Location http://hoslotracer.com/sites/default/files/imagecache/gallery_assist_thu...
Referrer http://hoslotracer.com/
Message Type: php
Cannot modify header information - headers already sent by (output started at /usr/home/hoslo/public_html/includes/common.inc:391) in /usr/home/hoslo/public_html/includes/common.inc on line 345.
Backtrace:
header(a:3:{i:0;s:42:"Location: http://hoslotracer.com/google404";i:1;b:1;i:2;i:301;})[common.inc:345];
.drupal_goto(a:4:{i:0;s:9:"google404";i:1;N;i:2;N;i:3;i:301;})[globalredirect.module:210];
..globalredirect_init(a:0:{})[?:?];
...call_user_func_array(a:2:{i:0;s:19:"globalredirect_init";i:1;a:0:{}})[module.inc:483];
....module_invoke_all(a:1:{i:0;s:4:"init";})[common.inc:2634];
....._drupal_bootstrap_full(a:0:{})[bootstrap.inc:1184];
......_drupal_bootstrap(a:1:{i:0;i:8;})[bootstrap.inc:1091];
.......drupal_bootstrap(a:1:{i:0;i:8;})[index.php:16];
........index.php