AJAX progress bar never stop spinning in firebug

I don't know if this is an issue beyond being annoying.  I implemented a login system on a website.  I uses a number of AJAX calls.  For some reason, when I use firefug to debug it there are a few GET calls that have a progress bar that never stops spinning and there are no headers or responses shown for the call in firebug, but everything else seems to be working as designed.

I have included a couple of screen shots of the firebug output.  Any idea why that might be?
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leakim971Connect With a Mentor PluritechnicianCommented:
check this page : http://php.net/manual/en/features.connection-handling.php

It look like your script return nothing and the connexion timeout don't occur

try the scripts proposed in the page in your script
sscottiAuthor Commented:
Thanks.  Not setup to try that at the moment, but that is useful information.
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