this line fails in internet explorer, but not firefox or chrome

this line fails in internet explorer, but not firefox or chrome

The following line fails in iexplorer, but not other browsers:
  1. $(xmldoc).find("idea:not(idea idea)").each( function(index) {
call stack is:

    dirNodeCheck
   
    Sizzle
    PSEUDO
    filter
    Sizzle
    find
>    processXML









The error is:

SCRIPT438: Object doesn't support this property or method
jquery-1.7.2.js, line 5276 character 6