Just checking my latest visitors in cpanel and see: __JC_UNKNOWN_VAR_cloak.daily-2009-08-03-62-00.vars.referer__ from this ip: 74.125.75.3 which is google. Should I be concerned?
Make a search in Google for JC UNKNOWN VAR cloak daily 2009 08 03 62 00 vars referer and you will find some pages with this title.