If you are seeing packet loss using PingPlotter i think there maybe a bug with certain two router set up's.
On a windows machine.
Start > run > type cmd > type ....
ping bbc.co.uk -n 25
ping twitter.com -n 25
ping twitter.co.uk -n 25
-n 25 will ping the server 25 times
Depending on where in the world you live you would pick a .co.uk or a .com URL or I.P
For Apple users
- Open Network Utility (located inside Applications > Utilities).
- Click Ping.
Then do the above without the -n 25 and enter 25 into the "send only _ pings" instead.
If you see 0 loss then its a PingPlotter bug.