Distribution/Version: Ubuntu

When copying a file or a batch of files, and a filename conflict occurs, the
user could do with more information on the problem.

I suggest:
a) the full file pathname should be taken out of the dialog text header because
it gets abbreviated (like this: "The file "/home/joachim/...sktop/log.txt"
already exists.  Would you like to replace it.") Replace the header text with
"You are trying to [copy|move] the file "log.txt", but a [newer|older] file of
the same name already exists at the destination." Then display the full
pathnames of both files below in plain text, eg

You are trying to [move|copy]: /foo/bar/log.txt
to the folder: /bar/foo/
where this file already exists: /bar/foo/log.txt

b) give date modified, date created, and file size information in the dialog.
This can either be alongside the two filenames, or with a dialog expansion
button, eg "more details". This information would be clearest if shown side by side.

c) offer to run a diff on the files. The result of this could either open in a
new window, or expand the dialog with a terminal output area (similar to that in
Synaptic)

See also Bug 134251 - "conflict while copying" file dialog should offer some
third alternative.