Comment 15 for bug 551950

Work around is to use command line tools, on 13.04 I used information on the following post. There where tons of reports of this bug with no solution other than editing code and rebuilding.

http://askubuntu.com/questions/187092/bluetooth-from-the-command-line-in-12-04

basically
bluez-simple-agent hci0 11:22:33:44:55:66

replace mac address with your own.
Will prompt for a PIN number.