"When I use the arrow keys to scroll through the contact lists, the info panes don't update unless I 
click on the name or press the spacebar."

I know it is annoying, but as I'm using AppleScript, the performance is very poor. I've had all kind of 
delays and desynchronization when implemented the automatic update. It's not trustable, if you 
scroll a little fast, results are not predictable. You can end up with the details of three contacts 
mixed.

No solution by now.