This hint will seem trivial to unix users, but might greatly help non-unix users stuck with the same problem that I had this morning. All my printers were gone, and I could not add any without getting this message "An error occurred while trying to add the selected printers. Error 1282". This error is documented on Apple's website in article 107054, but I had to fix it a little differently.
After typing sudo mkdir cups (as specified in the instructions) in the Terminal window, I got the following error message:
mkdir: cannot create directory `cups': File existsSo, before creating it, I deleted the cups directory using sudo rm cups. The rest went fine.
Mac OS X Hints
http://hints.macworld.com/article.php?story=2003072416002263