/dev/disk/by-label missing after upgrade to 1.42.7

Hi,

We are using /dev/disk/by-label/OURLABEL to mount USB disk partitions.

We were using Ubuntu 12.04 with 1.42 version of e2fsprogs - where we
encountered SSD corruption issues on unclean powerdown. It was
suggested that we upgrade to the latest e2fsprogs
(http://marc.info/?l=linux-ext4&m=137035378614543&w=2).

After the upgrade to 1.42.7, we do not have /dev/disk/by-label

I am not sure if this is the right place to ask this - but I thought
that I should start here and ask in udev mailing list later - (that
whole thing about correlation mumble causation).

I am still researching how /dev/disk/by-label comes into existence -
please advice if there is something obvious that I am missing.

Thanks

Autif