Find duplicates keyboard shortcut

[tomdriver]

I'm weeding out duplicate images.  The command Search > Duplicates works fine, but the command Ctrl+M,D does not.  I wish it would.

[Mario]

Works here. Press <Ctrl>+<M>, release, then press <D> within one second.

[tomdriver]

Tried again after closing and re-opening the program.  This time I got a result, but it makes no sense.  I focused on one image, pressed <Ctrl>+M,D, and up came the original plus 50 "matches"!  Only one of these looks anything like the original, and the file names vary immensely.  What's going on?

[Mario]

This search searches for binary duplicate files, by their checksum. It's the same as Search > Duplicates.
If this search finds files with identical check sums and sizes (it compares both) which look totally different you either have a problem with the check sums in that database (try to rescan the files with the force update option) or the 50 files found happen to have the same checksum and size but look totally different - something that is theoretically impossible.