I often need to know if two versions of a file are identical. Timestamps get changed, and filesize is unreliable as it's often rounded to the nearest 64K (or such) block by compilers/linkers. Only a hash (MD5, SHA, etc.) is positive proof. I want an "MD5" command under Files which would show me the MD5 hash of the file. When moving/copying files which appear to be duplicates, I'd to see the MD5 hashes of the files (perhaps as an option). I would even like a command to calculate the MD5 hashes of a directory and show it as a column in the directory panes. (Under Show Columns, if the MD5 column was enabled, it would automatically calculate and show these, for both local and remote sides).