Some worksheet functions like NOW() and TODAY() are "volatile" and are
recalculated when the worksheet is opened. Since these values (may)
change, Excel treats the workbook as if it had been changed and
prompts to save the changes.

Cordially,
Chip Pearson
Microsoft MVP
Excel Product Group
Pearson Software Consulting, LLC
www.cpearson.com
(email on web site)

On Thu, 20 Nov 2008 13:10:01 -0800, Donna
wrote:

Everytime I close a certain file, it always asks me if I want to save
changes, even though I didn't do anything. I just opened the file, looked
at, then closed it.