1 fstab does not get regenerated after udev upgrade
2 If enter manually mount points in fstab they do not get read
3 I can not mount any hard drives - I did not test it with usb sticks
The udev rule in /etc/udev/knoppix-post.rules is the one that starts rebuidfstab at boot and generates mount points which in turn pcmanfm uses with build in mount command to to mount drives. So obviously this rule has not bean read and executed at boot after udev upgrade.
I hope this makes it more clear.