Now, I had no problems downloading my spreadsheet, but I can't open it. I get the following error message, so I am wondering about the version of xcel:

This document was created with an unsupported version of Excel. Only documents created with Excel ’97 or later can be opened.

Now, I have a Mac, and I do not use ANY Windows products, but I do use Apple's iWork programs, including Numbers. I have had Numbers/iWork for over two years and never had a problem downloading or viewing a Windows Xcel spreadsheet. Not sure what's up, but can it be fixed?