I have built and run Slony-I 1.2.0 PRE-2 with good success with:

OS: AIX 5.3
Hardware: PowerPC
PostgreSQL: 8.1.3

PostgreSQL configured thus: '--prefix=/opt/dbs/pgsql813-slony12-AIX53-64bit-2006-06-08' '--with-tcl' '--without-tk' '--enable-thread-safety' '--enable-debug' '--with-libraries=/opt/dbs/tcl-8.4.12-64bit/lib:/opt/freeware/lib' '--with-includes=/opt/dbs/tcl-8.4.12-64bit/include:/opt/freeware/include' '--with-tclconfig=/opt/dbs/tcl-8.4.12-64bit/lib' '--without-readline' 'CC=gcc -maix64' 'LDFLAGS=-Wl,-bbigtoc'

Tests run:

New Generation tests, all run successfully:
 - test1
 - testddl
 - testschemanames
 - testseqnames
 - testtabnames
 - testutf8
-- 
output = ("cbbrowne" "@" "ca.afilias.info")
<http://dba2.int.libertyrms.com/>
Christopher Browne
(416) 673-4124 (land)