When I installed 3.4.2, I had boot and shutdown problems in two computers (another six went fine), so I downgraded them to back to 3.3.8.
I have just upgraded to 3.4.3, and it failed again. Commenting out nfs-common and nfs-server made them work again. Now the systems work fine, but I would like to have my nfs servers back (nfs client still works). :-)
I have only found this: https://bbs.archlinux.org/viewtopic.php?id=143419 describing the exact symptoms, but no solution yet. Any ideas?