There is problem with this new "Number duplicate groups" option or I don't understand it.
I don't know why but sometimes, number don't start to 1. Yesterday, group starts to 8, today 2. Look...
Now, I have suggestion.
If I use "filename and size", why groups header start by size then name ? Name then size will be better.
If I use "checksum", why groups header start by size then checksum ? Checksum first (why size is display?)