Looking at the compatibility-matrix[1], compatibility requires postgresql 8.2 from cvs, and the freebsd ports version is most likely based on a tar version.
'k, that matrix doesn't help much ... what date from CVS? :) Like, is that '8.2 from cvs where 8.2.2 is the tar', or 8.2 from cvs where 8.2.3 is the tar'?
8.2.3 was released Feb 7th ... is the cvs comment in the matrix newer or older then that? :)