Extra ajax request on Debian os

[new]

Hey everybody
I installed my application in two different os machines (Centos and Debian), everything is ok in centos but in debian one ajax request sent which I dont have any idea about it. I used live search grid panel inside my appalication and the unwanted request is received from that js.
sth like this in console:

http://host.address/ux/LiveSearchGri...=1331626315927

As I implemented ACL for each action in my php code, the response of above request is '
You are not authorized for this action.' Now I dont know what is this and who or where it call, but it make a problem for me. please help

Thanks in advance
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SOLVED

[mitchellsimoens]

This is Ext.Loader loading the source file for the live search grid.