Firebug keep reporting an error...

Firebug keep reporting an error...


Hi,
We are using jQuery and love it. So first of all, thanks a lot to the
community !
Nevertheless, I wanted to ask a question about an error Firebug keeps
reporting:
a is undefined
e()jquery-1.2.3.pack... (line 11)
e()jquery-1.2.3.pack... (line 11)
e()jquery-1.2.3.pack... (line 11)
e()jquery-1.2.3.pack... (line 11)
[Break on this error] eval(function(p,a,c,k,e,r){e=function(c)
{return(c<a?'':e(parseInt(c/a)))+((c=c%a...
at jquery-1.2.3.pack... (line 11)
Well, this does not prevent things to work, but it's disturbing. Do
you also see this error ? Does anyone know why this error ? (bug in
firebug, bug in the packer, real error ?)
Thanks,
Franck