I am not sure why your buyer's lender is still using that appraisal as it was done in July. In the past FHA appraisals were good for six months, but with the financial meltdown that our nation has experienced over the last year all lenders that I deal with on FHA are requiring new appraisals after 60 to 90 days due to the changing market.
Have your Realtor call the buyers agent to discuss this issue unless the buyers loan officer will talk with you. If you made many upgrades, the least that could be done if in fact they are using the old appraisal is to request a reconsideration of value which would necessitate including any upgrades made since the last report.
Hope this helps.
You can do 1 or 2 things:
1.) Inform the appraiser of your improvements and your neighborhood's rising value and see if both will make a difference in your own home's value. If so, he/she can update their appraisal accordingly upon by pulling new comps and coming back out to your home for a reinspection. They may charge an additional fee to do so however.
2.) FHA appraisal are good for 6 months. Afterwards, another one can be done. Given the appraisal is 4 months old already, and depending on your improvements and if your neighborhood continues to rise in value, you may just want to wait and order a new one in the hope of getting an even greater value. But this market is unpredictable at best, and you could get hit with a couple of short sales in your neighborhood in the interim as well. Food for thought and I hope this helps.
What you need to do is request the buyer's lender order a new appraisal, with a new effective date and value. The buyer's lender has the option to order a new appraisal with a new case number, or not, if the buyer is going FHA. FHA appraisals generally stay with the property for 6 months. Perhaps your buyer can switch to conventional, or some other type of financing.