John,
No joy. After tripping the test alert the dashboard did not list anything under recent alerts.
I forced-refresh. Nothing. I pulled up the dashboard in Firefox on the Mac and it showed correctly.
I closed IE on the W2K3 box and reopened. Then it showed up correctly. I acknowledged the alert (in IE), the page auto-refreshed, but still listed the alert as un-acknowledged. I forced-refresh and it was still listed as un-acknowledged.
However, when I refreshed Firefox and it showed correctly. Something's amiss.