Been very impressed with this plugin thus far. Today, however on of the sites I use it on has no data on the map even though Google Analytics is showing 13,000+ unique visitors in the last 5 days. I tried upgrade/reinstall. Still works fine on other sites.
The problem map: http://jesusonlineministries.org/home/current-visitors/spanish/
Another that works fine: http://jesusonlineministries.org/home/current-visitors/english/