I use the latest version of Firefox. Each time I try to load Garmin Connect I can see my information under the older style Garmen Connect. Then suddenly a window pops up stating "Authentication required, A username and password are being requested by http://connect.garmin.com. The site says: "Authorized Users Only!" I will type in my username and password and immediately get bumped to a page stating an internal server error occurred.
Anyone else having this problem?