Per the support policy at
http://www.postgresql.org/support/versioning/
the 8.3.x branch has an EOL date of February 2013.
That means that, barring discovery of a bug so bad that we decide to
make a fresh set of update releases within the month, the just-wrapped
8.3.23 is the last release in the 8.3.x series.
There is therefore no more need to back-patch into REL8_3_STABLE.
regards, tom lane