As stated in the CSSU-T thread just now, pairing seemed to be a little erratic for me so it may have something to do with that. I'll have another stab at it tomorrow as I haven't tried it since pairing in mate-bluetooth.
Decided to take another look, wish I hadn't ... I've just removed all the bluetooth userland from the laptop and gone back to blueman. Mate was giving a service record not found error on trying to send. Going back to blueman, send results in remote device refused connection. Now even map-client is giving errors.
gvfs-mount obex://[BTID]