PCInk - 1:55 pm on Mar 10, 2011 (gmt 0)

Then, when I re-uploaded the _backup_ files, the script exited immediately with a error message.

Check that it is being uploaded in the correct format (binary/ASCII) in your FTP client. It might be that the FTP program you use either doesn't recognise .aspx, perhaps only recognising .asp extensions.

Could be as simple as that?