I logged in and searched using Rider/Owner name, Horse Name, Hunter/Jumper category, and 2008 and also 'all years'. No results to any search I tried. I tried a search that has yielded results in the past and got nothing there, either.
If anyone has experienced trouble utilizing the "Results Tracker" feature on the Chronicle's main site (not getting results when you know you should!), please post (or PM) the exact search terms you used that gave you problems.