This has been previously reported. See: FM11: Using keyboard in Delete Record confirmation dialog
This is one of many acknowledged bugs that can be found in the Known Bug List here in the Report an Issue section of the forum.
It can also be downloaded as a database file from: http://www.4shared.com/file/8orL8apk/FMP_Bugs.html
Thank you for your post (and thank you PhilModJunk for replying).
I have also attached your post to the original issue. This is confirmed by our Testing department and it has been sent to our Development department for further review.