I'm not sure what happened, but one day I noticed that when I plugged in my compactflash reader, although the device appeared on the desktop, instead of k
onqueror opening /media/CANON_DC, it tried to open the name of the device with media:/dev/sda1, which did NOT work. 

I'm not aware of having changed anything. Where can I look to figure this out?

I've rebooted a couple of times and other than that I'm not really sure where to check. If I use a console, /media/CANON_DC *is* mounted and I can access 
it that way.

Here are logs from my /var/log/messages:

19:00:24 workstation kernel: usb 3-4.3: new full speed USB device using ehci_hcd and address 6
19:00:24 workstation kernel: usb 3-4.3: configuration #1 chosen from 1 choice
19:00:24 workstation kernel: scsi3 : SCSI emulation for USB Mass Storage devices
19:00:24 workstation kernel: usb-storage: device found at 6
19:00:24 workstation kernel: usb-storage: waiting for device to settle before scanning
19:00:29 workstation kernel:   Vendor: SanDisk   Model: ImageMate II      Rev: 1.30
19:00:29 workstation kernel:   Type:   Direct-Access                      ANSI SCSI revision: 02
19:00:30 workstation kernel: SCSI device sda: 503809 512-byte hdwr sectors (258 MB)
19:00:30 workstation kernel: sda: Write Protect is off
19:00:30 workstation kernel: sda: Mode Sense: 0b 00 00 08
19:00:30 workstation kernel: sda: assuming drive cache: write through
19:00:30 workstation kernel: SCSI device sda: 503809 512-byte hdwr sectors (258 MB)
19:00:30 workstation kernel: sda: Write Protect is off
19:00:30 workstation kernel: sda: Mode Sense: 0b 00 00 08
19:00:30 workstation kernel: sda: assuming drive cache: write through
19:00:30 workstation kernel:  sda: sda1
19:00:30 workstation kernel: sd 3:0:0:0: Attached scsi removable disk sda
19:00:30 workstation kernel: sd 3:0:0:0: Attached scsi generic sg0 type 0
19:00:30 workstation kernel: usb-storage: device scan complete
19:00:31 workstation hal-subfs-mount[15950]: SYMLINKS:: disk/by-id/usb-SanDisk_ImageMate_II_000000000006 disk/by-path/usb-000000000006:0:0:0
19:00:31 workstation hal-subfs-mount[15950]: MOUNT_POINT:: /media/CANON_DC
19:00:31 workstation hal-subfs-mount[15950]: MOUNTPOINT:: /media/CANON_DC
19:00:31 workstation hal-subfs-mount[15950]: Collected mount options and Called(0) /bin/mount -t subfs -o fs=floppyfss,sync,procuid,nosuid,nodev,exec,utf8=true /dev/sda1 "/media/CANON_DC"