Just upgraded to the latest 1.7.30 from 1.7.20. Everything works fine except the "Spy" tab. When I open it up, it shows listing of pages on top, but the content is empty. When I click on other pages, it opens up another blank page, while the page listing on top is gone, just pure empty page with the title "Spy" on left top.
It used to list all the visitors info correctly, at least until version 1.7.20 before the latest upgrade.