I have installed all updates for 12.04 (including libmtp* and mtp-tools) and the issue is not fixed for me also.
Attempting to browse the device when in MTP mode results in a delay of 2-3 minutes followed by an error the same as the DBus error described in comment #10.
I have installed all updates for 12.04 (including libmtp* and mtp-tools) and the issue is not fixed for me also.
Attempting to browse the device when in MTP mode results in a delay of 2-3 minutes followed by an error the same as the DBus error described in comment #10.