Hi,
I expected that, after upgrade from 1.3.8 to 1.3.9 lsmb cannot find the contrib directory, even it wrote the correct path:
Cannot find Contrib scripts in /usr/share/postgresql/9.1/extension/
I tested with 1.3.4, it is working well.
I did not checked, what changed between 1.3.8 - 1.3.9, I had no time yet.
Cheers, István