It's old news, but I missed that the Arduino IDE now is available in the Fedora repository, since Fedora 13.
sudo yum install arduino
You might also have to include your user in some additional groups:
sudo usermod -a -G uucp,dialout,lock $USER
Should you still have problems with messages like "How can I use Lock Files with rxtx? in INSTALL", setting the permission on /var/lock might help:
sudo chgrp uucp /var/lock
sudo chmod 775 /var/lock