Issue: You want to add mouse-over values within your graph portlets, but when you attempt to add this feature the mouse-over labels do not show up.
Resolution: Go to the administration side of the application, in the section titled "General Settings" there is a link called "System Options". Within this page, there is global setting for "Graph Format". If that is set to "JPG" the mouse-over will not work - this is a bug logged with CA. If you change the settings to "SVG" the mouse-over will work.
More at http://www.regoconsulting.com/