Here's what i see in the console (when running with --debug) after trying to drag something from the mtp device to my library :
(07:27:38) [0x8452408] [drop_received_cb] rb-sourcelist.c:550: drop recieved
(07:27:38) [0x8452408] [impl_receive_drag] rb-library-source.c:693: parsing uri list
(07:27:38) [0x8452408] [impl_paste] rb-library-source.c:1236: pasting entry rb-mtp-173
(rhythmbox:14283): Rhythmbox-WARNING **: filesystem root apparently doesn't exist!
(07:27:38) [0x8452408] [rb_shell_transfer_progress_cb] rb-shell.c:1890: transferred 0 tracks out of 1
(07:27:38) [0x8452408] [rb_statusbar_sync_status] rb-statusbar.c:474: updating status with: '2563 songs, 7 days, 6 hours and 16 minutes, 9.5 GB', '', 999.000000
(07:27:40) [0x8452408] [attach_output_pipeline] rb-encoder-gst.c:613: gio can't write to /home/dvandenbussche/Music/16%20Horsepower/16%20Horsepower%20EP/01%20-%20Haw.b-mtp-173, so using whatever sink will work
(rhythmbox:14283): GStreamer-CRITICAL **: gst_element_make_from_uri: assertion `gst_uri_is_valid (uri)' failed
(07:27:40) [0x8452408] [error_cb] rb-removable-media-manager.c:990: Error transferring track to /home/dvandenbussche/Music/16%20Horsepower/16%20Horsepower%20EP/01%20-%20Haw.b-mtp-173: Could not create a GStreamer sink element to write to /home/dvandenbussche/Music/16%20Horsepower/16%20Horsepower%20EP/01%20-%20Haw.b-mtp-173
(07:27:40) [0x8452408] [rb_encoder_gst_emit_completed] rb-encoder-gst.c:213: couldn't get size of destination /home/dvandenbussche/Music/16%20Horsepower/16%20Horsepower%20EP/01%20-%20Haw.b-mtp-173: Operation not supported
(07:27:40) [0x8452408] [completed_cb] rb-removable-media-manager.c:1012: completed transferring track to /home/dvandenbussche/Music/16%20Horsepower/16%20Horsepower%20EP/01%20-%20Haw.b-mtp-173 (0 bytes)
(07:27:40) [0x8452408] [rb_shell_transfer_progress_cb] rb-shell.c:1890: transferred 1 tracks out of 1
(07:27:40) [0x8452408] [rb_statusbar_sync_status] rb-statusbar.c:474: updating status with: '2563 songs, 7 days, 6 hours and 16 minutes, 9.5 GB', '', 999.000000
(07:27:40) [0x8452408] [rb_shell_transfer_progress_cb] rb-shell.c:1890: transferred 0 tracks out of 0
(07:27:40) [0x8452408] [rb_statusbar_sync_status] rb-statusbar.c:474: updating status with: '2563 songs, 7 days, 6 hours and 16 minutes, 9.5 GB', '', 999.000000
Here's what i see in the console (when running with --debug) after trying to drag something from the mtp device to my library : c:550: drop recieved source. c:693: parsing uri list source. c:1236: pasting entry rb-mtp-173
(07:27:38) [0x8452408] [drop_received_cb] rb-sourcelist.
(07:27:38) [0x8452408] [impl_receive_drag] rb-library-
(07:27:38) [0x8452408] [impl_paste] rb-library-
(rhythmbox:14283): Rhythmbox-WARNING **: filesystem root apparently doesn't exist! transfer_ progress_ cb] rb-shell.c:1890: transferred 0 tracks out of 1 sync_status] rb-statusbar.c:474: updating status with: '2563 songs, 7 days, 6 hours and 16 minutes, 9.5 GB', '', 999.000000 output_ pipeline] rb-encoder- gst.c:613: gio can't write to /home/dvandenbu ssche/Music/ 16%20Horsepower /16%20Horsepowe r%20EP/ 01%20-% 20Haw.b- mtp-173, so using whatever sink will work
(07:27:38) [0x8452408] [rb_shell_
(07:27:38) [0x8452408] [rb_statusbar_
(07:27:40) [0x8452408] [attach_
(rhythmbox:14283): GStreamer-CRITICAL **: gst_element_ make_from_ uri: assertion `gst_uri_is_valid (uri)' failed media-manager. c:990: Error transferring track to /home/dvandenbu ssche/Music/ 16%20Horsepower /16%20Horsepowe r%20EP/ 01%20-% 20Haw.b- mtp-173: Could not create a GStreamer sink element to write to /home/dvandenbu ssche/Music/ 16%20Horsepower /16%20Horsepowe r%20EP/ 01%20-% 20Haw.b- mtp-173 gst_emit_ completed] rb-encoder- gst.c:213: couldn't get size of destination /home/dvandenbu ssche/Music/ 16%20Horsepower /16%20Horsepowe r%20EP/ 01%20-% 20Haw.b- mtp-173: Operation not supported media-manager. c:1012: completed transferring track to /home/dvandenbu ssche/Music/ 16%20Horsepower /16%20Horsepowe r%20EP/ 01%20-% 20Haw.b- mtp-173 (0 bytes) transfer_ progress_ cb] rb-shell.c:1890: transferred 1 tracks out of 1 sync_status] rb-statusbar.c:474: updating status with: '2563 songs, 7 days, 6 hours and 16 minutes, 9.5 GB', '', 999.000000 transfer_ progress_ cb] rb-shell.c:1890: transferred 0 tracks out of 0 sync_status] rb-statusbar.c:474: updating status with: '2563 songs, 7 days, 6 hours and 16 minutes, 9.5 GB', '', 999.000000
(07:27:40) [0x8452408] [error_cb] rb-removable-
(07:27:40) [0x8452408] [rb_encoder_
(07:27:40) [0x8452408] [completed_cb] rb-removable-
(07:27:40) [0x8452408] [rb_shell_
(07:27:40) [0x8452408] [rb_statusbar_
(07:27:40) [0x8452408] [rb_shell_
(07:27:40) [0x8452408] [rb_statusbar_