method without parameters in ajax call

[eluser]mcr_rm[/eluser]
I use jQuery and CI on commercial high (ish) traffic sites and the ajax load command all the time and have never had an issue with the cache (well I have but not a 404 and instead passed in new Date.time with the url to ensure a fresh page each time).

So how can this be the issue, and you mention IE here but the screenshot is from firebug on firefox?

As long as it works for you that is all that counts. Secondly are you calling an area of the page you are loading or the full page with the header file in and injecting into your body?

If so that will crash IE. You need to target a section for example .load('/the/page/url/ #contentidorclass', '', function(){ callback if required.});