Everytime I try to edit an athlete on my team that has the incorrect grade of 1, I am dropped onto a page that states "An unexpected error has just occured"
Here is a newly created page in the wiki, that might clarify part of your situation.
http://wiki.athletic.net/Athlete%20Editor.ashx
Hope that helps,
Andy
Dave,
The error you were receiving has been fixed. Let me know if you need additional assistance.