Excel 2010 missing default suggested file name in Save As dialog box

I’m using Excel 2010 running on Windows 7 (32 bit).  When I open a certain file which produces the following message: "A file is in a different file format than its extension indicates", and then go to “Save As” (or “Save”) the file, the default suggested file name is missing (blank).  This didn't occur in previous versions of Excel. In previous versions, Excel would automatically populate the original file name in to the File Name field.  I have searched all over the net, looking for a way to change Excel so that it will once again populate the file name in this situation. 

To reproduce:

1. Create a new blank workbook
2. save as type “Web Page”, (i.e. File name:  “Blank Example.html”)
3. Close workbook
4. In windows, rename file from .html to .xls  (i.e. rename “Blank Example.html” to “Blank Example.xls”)
5. In Excel open renamed file (i.e. “Blank Example.xls”) and click “Yes” when prompted with the “A file is in a different file format than its extension indicates” message.
6. Do a “Save As” and you will notice that the File Name is blank. In previous versions, this field would contain the current workbook file name  (i.e. “Blank Example.xls”)

Any help will be greatly appreciated.