The multi-arch support introduced in Ubuntu 11.04 provides new locations for 32-bit and 64-bit libraries:
Previously, the standard /usr/lib and /usr/lib64 directories were used. The SunPKCS11
provider fails to load Mozilla NSS libraries. The provider needs to be modified to load
from the new locations.
In addition, the Mozilla NSS libraries on Ubuntu are now installed into two directories instead of one. Specifically, the libsoftokn3 library is now in a 'nss' subsirectory
below the system libraries directory.