BT4pre does not detect all available card slots, only detects compact flash. The card reader is fully detected and works properly in Ubuntu Jaunty, and Windows XP.

External Card Reader All-in-1 USB 2.0 - CR006V3

EDIT: Here is the dmesg output for each distro:

BT4pre 2.6.30.5
usb 1-1: new high speed USB device using ehci_hcd and address 3
usb 1-1: configuration #1 chosen from 1 choice
scsi2 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 3
usb-storage: waiting for device to settle before scanning
scsi 2:0:0:0: Direct-Access Generic- Compact Flash 1.00 PQ: 0 ANSI: 0 CCS
usb-storage: device scan complete
sd 2:0:0:0: [sda] Attached SCSI removable disk
sd 2:0:0:0: Attached scsi generic sg0 type 0
Ubuntu Jaunty
[ 241.156074] usb 2-2: new high speed USB device using ehci_hcd and address 5
[ 241.849112] usb 2-2: configuration #1 chosen from 1 choice
[ 241.915353] Initializing USB Mass Storage driver...
[ 241.916051] scsi4 : SCSI emulation for USB Mass Storage devices
[ 241.916576] usbcore: registered new interface driver usb-storage
[ 241.916586] USB Mass Storage support registered.
[ 241.921379] usb-storage: device found at 5
[ 241.921385] usb-storage: waiting for device to settle before scanning
[ 246.920702] usb-storage: device scan complete
[ 246.927267] scsi 4:0:0:0: Direct-Access Generic- Compact Flash 1.00 PQ: 0 ANSI: 0 CCS
[ 246.933701] scsi 4:0:0:1: Direct-Access Generic- SM/xD-Picture 1.00 PQ: 0 ANSI: 0 CCS
[ 246.940092] scsi 4:0:0:2: Direct-Access Generic- SD/MMC 1.00 PQ: 0 ANSI: 0 CCS
[ 246.946575] scsi 4:0:0:3: Direct-Access Generic- MS/MS-Pro 1.00 PQ: 0 ANSI: 0 CCS
[ 246.950482] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[ 246.950954] sd 4:0:0:0: Attached scsi generic sg2 type 0
[ 246.958434] sd 4:0:0:1: [sdc] Attached SCSI removable disk
[ 246.958571] sd 4:0:0:1: Attached scsi generic sg3 type 0
[ 246.962757] sd 4:0:0:2: [sdd] Attached SCSI removable disk
[ 246.962882] sd 4:0:0:2: Attached scsi generic sg4 type 0
[ 246.966137] sd 4:0:0:3: [sde] Attached SCSI removable disk
[ 246.966249] sd 4:0:0:3: Attached scsi generic sg5 type 0