I seem to have the same problem. Nothing happens when I press the Share link... The activity is not private and Share is not greyed out.
It work before the last update to GarminConnect was applied.
Can anyone help please?
I've found in Windows with IE 8 if you double click on the share button (you don't seem to need to double click any of the other buttons) you will get an icon either just above the share button or overlaying the share button that you can then click to get a context menu of different sharing options. Seems to be a bit buggy yet. I haven't tried it on my mac as of yet..
Bueller? anyone? Do Garmin employees read these? I received an email repsonse from tech support saying the share button should work very soon but i don't know if he meant hours, days, weeks or months.