lensfun-0.2.5_3 broken on x64 installer DVD
I had the same problem on my x64 installation of PCBSD 9.1.
Tracked the cause down today -- the lensfun-0.2.5_3.txz Package on the PCBSD 9.1 x64 installer DVD is broken. It lacks the liblensfun.so file, resulting in the symptoms reported by the previous two posts above.
The x32 installer DVD's copy of lensfun-0.2.5_3.txz does in fact correctly contain liblensfun.so, so people running x32 installations never notice any problem.
(And, as noted by the previous poster, 'make reinstall' of the actual Port solves the problem.)