I am battling to change from miles to Km's on Garmin connect, I click on the drop down box to change but it is not saving my option. What am I doing wrong? It shows Km's on my watch Forerunner 10) but not on connect.
I have the same problem and I use Firefox with Firebug to check onchange event on drop down box
where we can select the unit but I don't found any event on this box.
So you can change as many time as you want the value, the browser does nothing to send your preference to Garmin website.
The Garmin's developers shoud correct this bug before we can change our settings.