I guess you fixed your dvd driver by deleting the Lower- and UpperFilter registry entries. in this case you either ignore the error (like I do) or re-install itunes.
You are correct sir...I tried re-installing iTunes but I got the same error afterwards...I think maybe ignoring the error (like you do) is the way to go.
Shortly after I posted this I had one of those moments where you go "I'll bet what I did to resolve my other issue caused this one"....