This part is no longer true:
+ <listitem>
+ <para>
+ PL/Perl subroutines are now given perl-visible names (Tim Bunce)
+ </para>
+
+ <para>
+ PL/Perl subroutines are anonymous subrefs; this change adds entries
+ to the Perl symbol table for them, making profiling and code coverage
+ tools much more usable.
+ </para>
+ </listitem>
+
http://archives.postgresql.org/pgsql-committers/2010-06/msg00159.php
...Robert