Yes this has been reported and acknowledged as a bug. However, based on your comments, I'm upgrading the risk level to "high" in the Known Bug List. (Note: risk level settings in the Known Bug List are mine, they aren't used by FileMaker Inc. to set priorities for fixing them.)
For More Information see: Delete an entry in the dataviewer
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 finding the related post).
I have attached your post to the original issue for our Development and Testing departments to review.