As I remember but not exactly either "safely remove" or "umount" does not properly and safely remove the device even in previous ubuntu 64 and 32. I am not sure but I think that right click menu "umount" works but not "safely remove" (after that I had problems with mounting it in windows PC which I used to solve by using a LiveCD, opening the device to see the content, closing and restarting PC with windows) I think that "safely remove" does not umounts properly the device. Cannot reproduce the problem since it appears randomly. this is from last unfortunate time: I inserted the usb, (fat32), made some heavy copy, move etc. After copy tried to delete some files but were not deleted ( right click menu "to trash" was dimmed). I tried "safely remove" or "umount" from right click menu. (Do not remember for sure) I removed usb after some seconds that ubuntu did nothing -but removed icon from desktop, tried it in some XP pro which found it as non formatted, retried some times in ubuntu. (removing it from one usb slot and inserting it in the other ilias@fserver2:~$ uname -a Linux fserver2 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010 x86_64 GNU/Linux from messages.log ... May 24 19:03:05 fserver2 kernel: [36862.532225] usb 1-2: new high speed USB device using ehci_hcd and address 2 May 24 19:03:06 fserver2 kernel: [36862.684119] usb 1-2: configuration #1 chosen from 1 choice May 24 19:03:06 fserver2 kernel: [36862.737500] Initializing USB Mass Storage driver... May 24 19:03:06 fserver2 kernel: [36862.737625] scsi4 : SCSI emulation for USB Mass Storage devices May 24 19:03:06 fserver2 kernel: [36862.737770] usbcore: registered new interface driver usb-storage May 24 19:03:06 fserver2 kernel: [36862.737807] USB Mass Storage support registered. May 24 19:03:11 fserver2 kernel: [36867.733222] scsi 4:0:0:0: Direct-Access A-DATA USB Flash Drive 0.00 PQ: 0 ANSI: 2 May 24 19:03:11 fserver2 kernel: [36867.733646] sd 4:0:0:0: Attached scsi generic sg4 type 0 May 24 19:03:11 fserver2 kernel: [36867.734848] sd 4:0:0:0: [sdd] 31588352 512-byte logical blocks: (16.1 GB/15.0 GiB) May 24 19:03:11 fserver2 kernel: [36867.735468] sd 4:0:0:0: [sdd] Write Protect is off May 24 19:03:11 fserver2 kernel: [36867.737958] sdd: sdd1 May 24 19:03:11 fserver2 kernel: [36868.065725] sd 4:0:0:0: [sdd] Attached SCSI removable disk May 24 19:03:11 fserver2 kernel: [36868.490683] usb 1-2: reset high speed USB device using ehci_hcd and address 2 May 24 19:03:14 fserver2 kernel: [36871.379937] usb 1-2: reset high speed USB device using ehci_hcd and address 2 .... hundreds of the same msg May 24 19:05:20 fserver2 kernel: [36996.847299] usb 1-2: reset high speed USB device using ehci_hcd and address 2 May 24 19:05:41 fserver2 pulseaudio[1558]: ratelimit.c: 364 events suppressed May 24 19:05:50 fserver2 kernel: [37027.520881] usb 1-2: reset high speed USB device using ehci_hcd and address 2 .... hundreds of the same msg May 24 19:31:21 fserver2 kernel: [38557.991283] usb 1-2: reset high speed USB device using ehci_hcd and address 2 May 24 19:33:46 fserver2 kernel: [38702.933288] npviewer.bin[7782]: segfault at ff999ea8 ip 00000000ff999ea8 sp 00000000ffe27f8c error 14 May 24 19:48:42 fserver2 kernel: [39598.142322] usb 1-2: reset high speed USB device using ehci_hcd and address 2 ... some same msgs May 24 19:51:48 fserver2 kernel: [39784.572278] usb 1-2: reset high speed USB device using ehci_hcd and address 2 May 24 19:53:30 fserver2 kernel: [39886.225841] usb 1-2: USB disconnect, address 2 May 24 19:53:52 fserver2 kernel: [39908.699991] usb 1-2: new high speed USB device using ehci_hcd and address 3 May 24 19:53:52 fserver2 kernel: [39908.851849] usb 1-2: configuration #1 chosen from 1 choice May 24 19:53:52 fserver2 kernel: [39908.851977] scsi5 : SCSI emulation for USB Mass Storage devices May 24 19:53:57 fserver2 kernel: [39913.850343] scsi 5:0:0:0: Direct-Access A-DATA USB Flash Drive 0.00 PQ: 0 ANSI: 2 May 24 19:53:57 fserver2 kernel: [39913.850957] sd 5:0:0:0: Attached scsi generic sg4 type 0 May 24 19:53:57 fserver2 kernel: [39913.851850] sd 5:0:0:0: [sdd] 31588352 512-byte logical blocks: (16.1 GB/15.0 GiB) May 24 19:53:57 fserver2 kernel: [39913.852746] sd 5:0:0:0: [sdd] Write Protect is off May 24 19:53:58 fserver2 kernel: [39913.855204] sdd: unknown partition table May 24 19:53:58 fserver2 kernel: [39914.184720] sd 5:0:0:0: [sdd] Attached SCSI removable disk May 24 19:54:40 fserver2 kernel: [39956.586800] usb 1-2: USB disconnect, address 3 May 24 19:58:25 fserver2 kernel: [40181.109142] usb 1-1: new high speed USB device using ehci_hcd and address 4 May 24 19:58:25 fserver2 kernel: [40181.261099] usb 1-1: configuration #1 chosen from 1 choice May 24 19:58:25 fserver2 kernel: [40181.261226] scsi6 : SCSI emulation for USB Mass Storage devices May 24 19:58:30 fserver2 kernel: [40186.258716] scsi 6:0:0:0: Direct-Access A-DATA USB Flash Drive 0.00 PQ: 0 ANSI: 2 May 24 19:58:30 fserver2 kernel: [40186.259146] sd 6:0:0:0: Attached scsi generic sg4 type 0 May 24 19:58:30 fserver2 kernel: [40186.260063] sd 6:0:0:0: [sdd] 31588352 512-byte logical blocks: (16.1 GB/15.0 GiB) May 24 19:58:30 fserver2 kernel: [40186.260715] sd 6:0:0:0: [sdd] Write Protect is off May 24 19:58:30 fserver2 kernel: [40186.263331] sdd: unknown partition table May 24 19:58:30 fserver2 kernel: [40186.592345] sd 6:0:0:0: [sdd] Attached SCSI removable disk May 24 20:00:55 fserver2 kernel: [40331.300091] usb 1-1: USB disconnect, address 4 May 24 20:01:08 fserver2 kernel: [40344.096753] usb 1-2: new high speed USB device using ehci_hcd and address 5 May 24 20:01:08 fserver2 kernel: [40344.248597] usb 1-2: configuration #1 chosen from 1 choice May 24 20:01:08 fserver2 kernel: [40344.248778] scsi7 : SCSI emulation for USB Mass Storage devices May 24 20:01:13 fserver2 kernel: [40349.246110] scsi 7:0:0:0: Direct-Access A-DATA USB Flash Drive 0.00 PQ: 0 ANSI: 2 May 24 20:01:13 fserver2 kernel: [40349.246519] sd 7:0:0:0: Attached scsi generic sg4 type 0 May 24 20:01:13 fserver2 kernel: [40349.247366] sd 7:0:0:0: [sdd] 31588352 512-byte logical blocks: (16.1 GB/15.0 GiB) May 24 20:01:13 fserver2 kernel: [40349.247986] sd 7:0:0:0: [sdd] Write Protect is off May 24 20:01:13 fserver2 kernel: [40349.250602] sdd: unknown partition table May 24 20:01:13 fserver2 kernel: [40349.579488] sd 7:0:0:0: [sdd] Attached SCSI removable disk May 24 20:01:14 fserver2 kernel: [40349.905244] usb 1-2: reset high speed USB device using ehci_hcd and address 5 .. some same msgs May 24 20:02:27 fserver2 kernel: [40423.666066] usb 1-2: reset high speed USB device using ehci_hcd and address 5 May 24 20:03:08 fserver2 kernel: [40464.685396] usb 1-2: USB disconnect, address 5 May 24 20:03:15 fserver2 kernel: [40470.773808] usb 1-1: new high speed USB device using ehci_hcd and address 6 May 24 20:03:15 fserver2 kernel: [40470.925633] usb 1-1: configuration #1 chosen from 1 choice May 24 20:03:15 fserver2 kernel: [40470.925820] scsi8 : SCSI emulation for USB Mass Storage devices May 24 20:03:20 fserver2 kernel: [40475.923271] scsi 8:0:0:0: Direct-Access A-DATA USB Flash Drive 0.00 PQ: 0 ANSI: 2 May 24 20:03:20 fserver2 kernel: [40475.923682] sd 8:0:0:0: Attached scsi generic sg4 type 0 May 24 20:03:20 fserver2 kernel: [40475.924421] sd 8:0:0:0: [sdd] 31588352 512-byte logical blocks: (16.1 GB/15.0 GiB) May 24 20:03:20 fserver2 kernel: [40475.925017] sd 8:0:0:0: [sdd] Write Protect is off May 24 20:03:20 fserver2 kernel: [40475.927519] sdd: May 24 20:03:20 fserver2 kernel: [40476.255782] sd 8:0:0:0: [sdd] Attached SCSI removable disk May 24 20:47:50 fserver2 kernel: [43146.007827] npviewer.bin[10165]: segfault at ff999ea8 ip 00000000ff999ea8 sp 00000000ffac44dc error 14