There is a "Corrections" post in May, 2009 that provides corrections to typos etc.
Look in the far right column of this page and click on May 2009.
In April 2009 you will find corrected instructions for adding additional historical periods to the FCF Worksheet.
Please take a quick look at all of the posting topics as there may be something that interests you.
If you find other typos, errors, etc., please email me.