This removes the “This file was downloaded, are you sure…” warning when dealing with downloaded files.
There are attributes other than com.apple.quarantine, such as:
sudo xattr -d com.apple.quarantine *
I guess it’s how TextMate
remembers its position in a text file. If you want to see what extended attributes your files have, you can either use “xattr -l filename” or just “ls -l@“.