At least in my XFCE4 the eudev update makes USB disk mount impossible. The system boot disk is a 120GB SSD where the /etc/fstab file mounts an HDD partition that contains only the tmp, run, var, root and home directories. These directoriy are bind-mounted with system ones in order to use HDD for those directories that are generally written more often. Another partition of the HDD is used as a swap partition. Perhaps this configuration confuses eudev. I downgraded to version 3.2.5 and everything works fine.
This is my /etc/fstab:
Code:
/dev/sda2 / ext4 defaults,noatime,nodiratime,discard 1 1
tmpfs /dev/shm tmpfs defaults 0 0
/dev/sdb1 swap swap defaults 0 0
/dev/sdb2 /mnt/seagate ext4 defaults 0 0
/mnt/seagate/tmp /tmp none bind 0 0
/mnt/seagate/run /run none bind 0 0
/mnt/seagate/var /var none bind 0 0
/mnt/seagate/root /root none bind 0 0
/mnt/seagate/home /home none bind 0 0