If you scan for pairing-ready Bluetooth devices and one of the device's names is NULL, bluetooth-wizard shows the alias based on the devices address, like 00-26-55-09-6A-9C (and "bt-adapter -d" of bluez-tools shows "Name: (null)"). If you click on such an entry in bluetooth-wizard (or move the selection to such an entry with the cursor keys), the wizard simply crashes, making it impossible to pair this device.
I observed this in Quantal both on a standard 64-bit Intel PC and on the Nexus 7.
If you scan for pairing-ready Bluetooth devices and one of the device's names is NULL, bluetooth-wizard shows the alias based on the devices address, like 00-26-55-09-6A-9C (and "bt-adapter -d" of bluez-tools shows "Name: (null)"). If you click on such an entry in bluetooth-wizard (or move the selection to such an entry with the cursor keys), the wizard simply crashes, making it impossible to pair this device.
I observed this in Quantal both on a standard 64-bit Intel PC and on the Nexus 7.