Can't see USB reader in Linux Mint 15

Can't see USB reader in Linux Mint 15

I'm new to Linux. I installed Mint 14 and everything was fine, my USB card reader worked straight away. I have just upgraded to Linux Mint 15 and now my SD card reader won't work – well I can't access it.
dmesg shows:
[11310.514867] usb 1-1: USB disconnect, device number 4
[11316.940071] usb 1-3: new high-speed USB device number 5 using ehci-pci
[11317.074629] usb 1-3: New USB device found, idVendor=058f, idProduct=6364
[11317.074636] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[11317.074640] usb 1-3: Product: Mass Storage Device
[11317.074643] usb 1-3: Manufacturer: Generic
[11317.074646] usb 1-3: SerialNumber: 058F63646476
[11317.075620] scsi4 : usb-storage 1-3:1.0
[11317.077606] hid-generic 0003:058F:6364.0005: hiddev0,hidraw2: USB HID v1.10 Device [Generic Mass Storage Device] on usb-0000:00:1d.7-3/input1
[11318.072904] scsi 4:0:0:0: Direct-Access     Generic- SD/MMC           1.00 PQ: 0 ANSI: 0
[11318.073508] scsi 4:0:0:1: Direct-Access     Generic- Compact Flash    1.01 PQ: 0 ANSI: 0
[11318.074012] scsi 4:0:0:2: Direct-Access     Generic- SM/xD-Picture    1.02 PQ: 0 ANSI: 0
[11318.074633] scsi 4:0:0:3: Direct-Access     Generic- MS/MS-Pro        1.03 PQ: 0 ANSI: 0 CCS
[11318.078880] sd 4:0:0:0: Attached scsi generic sg1 type 0
[11318.079153] sd 4:0:0:1: Attached scsi generic sg2 type 0
[11318.079548] sd 4:0:0:2: Attached scsi generic sg3 type 0
[11318.079751] sd 4:0:0:3: Attached scsi generic sg4 type 0
[11318.080395] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[11318.084411] sd 4:0:0:1: [sdc] Attached SCSI removable disk
[11318.087891] sd 4:0:0:2: [sdd] Attached SCSI removable disk
[11318.089391] sd 4:0:0:3: [sde] Attached SCSI removable disk
I don't know what to do next. From reading I think I need to mount it but I don't know how.
Anyone's advice appreciated, and yes – downgrading back to 14 is an option.