ctrlguy I have IE7 and the problem exists both there and in Firefox with IETab but only on some sites. I'm pretty sure it's an iLON problem. Maybe a CSS problem.
Does your polling interval display constantly when you are not doing a mouse over?
Don't know if it is related to your issue but maybe?
When I display any page with data points the polling interval of 1 s is displayed in the status bar and that is about as long as the data point is displayed when moused over but when I display any page without data points the links will display in the status bar for as long as they are moused over.
Re: polling interval, I believe it's automatic in e3 and tries at 1 second then moves up from there if the data aren't coming in fast enough. In SmartServer, you can set the poll rate in Contribute. My pages only show the poll rate when there's a problem.
For IE Tab, go to Tools: Add-ons and search for IE tab. Download, install and restart. Works great.