Piwik 0.8 - When the setting of UTC is -5, the "Live Visitor!" daily summary stops counting at 19.00 hrs. and sets the values for visits and pageviews to 0 (afer 00.00 hrs. the count starts fresh for the new day and works fine until 19.00 hrs. of that day). All other widgets seem not to be having this problem.
My installation has the same problem.