Thanks. That's a good resource. I'm still getting errors - though they say "the problem has been resolved" I'm just trying to show the missus where I rode yesterday!
This a general error that can happen due to just about anything. Usually it is an indication that the system is currently having problems or that the file is corrupt. You may want to try uploading again later, but don't be surprised if customer support is already looking into it.
It also may indicate that your upload may not ever make it into the system due to insufficient track data, so contact customer support (mailto:firstname.lastname@example.org) to see if they can help.