I get the same error:404 - File or directory not found.The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.Using Safari 5 and 10.6.3
Works fine for me and two customers that I happened to work with over the phone this week to go to "License Management".
I just went to the license page again, and I also get the 404 error now. With Safari and FF in Mac OS 10.5 and 10.6 ... Strange.
I continue to get the error as well.