I\'m trying to enter some UTF-8 characters into a LaTeX file in TextMate (which says its default encoding is UTF-8), but LaTeX doesn\'t seem to understand them.
Using file command with the --mime-encoding option (e.g. file --mime-encoding some_file.txt) instead of the -I option works on OS X and has the added benefit of omitting the mime type, "text/plain", which you probably don't care about.