From Nitin Shah who is the dev on BO Web part... 

KPIs in Role Center Business Overview Web Part keeps loading all the time and never ends.
This might due to using IE enhanced security.  IE enhanced security is only for the server series - Win2k3 and Win2k8.

 

The issue is the “loading” image for the BO webpart is a gif file.

The IE enhanced security feature turns off the setting Play animations in web pages. With this setting turned off, the gif does not load.

This setting Play animations in web pages  needs to be turned on for the webpart to work. 

It can be found in IE at Tools->Internet Options->Advanced tab->Multimedia (note this setting requires a browser restart)

 

You can keep IE enhanced security on, but just change the one setting for the Play animations in web pages.