Error in line 1772 in ver 1.2.6?

Hi,
I am using versiion 1.2.6 of JQuery.js. Firebug notifies me that there
is an error in line 1772 of JQuery.js. The message that I am getting
is;
"fn is not a function"
The statement in line 1772 is
"return fn(elem, i, m, r);"
Should this be
"return function(elem, i, m, r);"?
Thanks