Undefined index: 0 in user_node_load()

Can anyone tell me how to get this error off of my front page?

• Notice: Undefined index: 0 in user_node_load() (line 3586 of /home/imobile/public_html/playerstopros.com/drupal/modules/user/user.module).
• Notice: Trying to get property of non-object in user_node_load() (line 3586 of /home/imobile/public_html/playerstopros.com/drupal/modules/user/user.module).
• Notice: Undefined index: 0 in user_node_load() (line 3587 of /home/imobile/public_html/playerstopros.com/drupal/modules/user/user.module).
• Notice: Trying to get property of non-object in user_node_load() (line 3587 of /home/imobile/public_html/playerstopros.com/drupal/modules/user/user.module).
• Notice: Undefined index: 0 in user_node_load() (line 3588 of /home/imobile/public_html/playerstopros.com/drupal/modules/user/user.module).
• Notice: Trying to get property of non-object in user_node_load() (line 3588 of /home/imobile/public_html/playerstopros.com/drupal/modules/user/user.module).

Are you running drupal?  If so, you need to post in the drupal forums.  If you are not running drupal, you have a serious issue here.