I just set up a wiki (from trunk) with PostGres to find and fix the PG issues in SMW. I found one during the SMW table setup that was easily fixed . I've imported a bunch of data in my wiki and can run queries without getting any errors, so looks like there are no big problems remaining. Anyone aware of other (PG) issues? If so, I'll have a look at these and attempt to fix - let's make SMW 1.6 work smoothly for PG users :)
Jeroen De Dauw
Don't panic. Don't be evil.