Comment 3 for bug 79152

Just for information, you need to umount (or pumount) removable devices before unplugging them - if you fail to do so, you leave your drive in an unspecified state. This is most probably the cause of the problem you are describing here. There is nothing pmount could help you with here.

Another information: if you cant mount the device /dev/sdb1, it probably means that the device name changed somehow. Look at the output of dmesg. You should find something similar to the following:

usb-storage: device found at 3
usb-storage: waiting for device to settle before scanning
scsi 1:0:0:0: Direct-Access SONY NWWM MEM AAD2 1.00 PQ: 0 ANSI: 0 CCS
sd 1:0:0:0: Attached scsi removable disk sda
usb-storage: device scan complete
SCSI device sda: 247169 2048-byte hdwr sectors (506 MB)
sda: Write Protect is off
sda: Mode Sense: 00 6a 00 00
sda: assuming drive cache: write through
SCSI device sda: 247169 2048-byte hdwr sectors (506 MB)
sda: Write Protect is off
sda: Mode Sense: 00 6a 00 00
sda: assuming drive cache: write through
 sda: sda1

In this case, the device to pmount is /dev/sda1