I think the following line in slonik.c line 1950:

        if (adminfo->pg_version > 70300)        /* 7.2 and lower */

Should be:

        if (adminfo->pg_version < 70300)        /* 7.2 and lower */

Because I'm trying to run update functions and getting an error:
<stdin>:7: unsupported PostgreSQL version 8.1
<stdin>:7: could not open file /usr/share/slony1/slony1_funcs.v00.sql

I made this change and it ran fine.

-Steve Wormley