Hi,
I'm posting this in case anyone else encounters this problem. I make extensive use of the Terminal (learned Unix before Macs...) and, as I found out, the "tar" command can sometimes dump out a file named "@LongLink" ... and this file caused my attempt to copy (burn) a directory to a DVD with Toast Titanium to fail. The @LongLink file is created mode 0 and Toast complained about permission problems. You can find such files with the finder Find command, by searching for files which end with the letters LongLink; or it can be found from the terminal by typing
find . -perm 0 -print
which finds all files without any read/write permission (mode 0). The file can be removed with "rm" ... once you find it. The fix is apparently to use gnutar instead of tar from the terminal.
FYI,
Brian