otter stats strange: Strange behaviour on urls ending with index.html

[Till Keyling]

I recognized a strange behaviour of the otter stats querry: When passed f.e. this URL  http://otter.topsy.com/stats.json?url=http://www.cnn.com/2012/03/05/us/obama-netanyahu/index.html , it return zero tweets, but without the "index.html" ( http://otter.topsy.com/stats.json?url=http://www.cnn.com/2012/03/05/us/obama-netanyahu/  ) it returns the accurate count. Why is that so? Will topsy automatically slice the index.html part?