Not sure if this has been addressed somewhere in the 109 pages of posts

but I noticed that when I switch tabs, and the "requesting content" message appears, there is no "loading" image (I get a red x in IE). To make the "requesting content" image appear go to your ajaxtabs.js file and find the following section of code, and
remove the forward slash ( / ), shown here in bold red:
Code:
var ddajaxtabssettings={}
ddajaxtabssettings.bustcachevar=1 //bust potential caching of external pages after initial request? (1=yes, 0=no)
ddajaxtabssettings.loadstatustext="<img src='/clientscript/tabs/loading.gif' /> Requesting content..."
Do that, and the loading image will appear when switching tabs.