In fact, your initial suspicion seems to be correct after a (very quick) glance at the code. They are handling both of those cases separately. http://tcr.tynt

In fact, your initial suspicion seems to be correct after a (very quick) glance at the code. They are handling both of those cases separately. http://tcr.tynt.com/javascripts/Tracer.js http://tcr.tynt.com/javascripts/Tracer.js