She went over everything about my 2008 return with a fine-tooth comb and then discussed it with her boss. Our response is going to be an amended return, which not only shows that I do not owe money but, in fact, deserve an additional refund of about $200!

Don't you just love happy endings?
I told her that with the holidays, I may not be able to get the form filled out and returned to our federal friends until after the New Year. She told me it won't make a difference, that they aren't known to be prompt about processing amended returns and issuing refunds and I probably won't have cash in hand until after April, anyway.
No matter. Not only do I not have to worry, I have a few bucks coming my way ... someday.
Hurray!