This morning, while trying to move some files between my mobile phone and my Ubuntu 8.04.1 machine -- I was greeted with a "Operation Not Supported By Backend" message with the address of my phone and the drag between Nautilus windows was terminated.
Turns out, it is because the GVFS backend for Bluetooth doesn't support the device -- and using the older, GNOME-VFS way isn't supported either.
The 'Send-To Bluetooth' option (right-clicking the files you want to send and selecting your mobile) works as per normal and successfully transferred 25M of files to my phone in under a minute.
