The problem is not in General Comments, but in acs-kernel/sql/postgresql/apm-create.sql. The bug was introduced by donb in revision 1.70 of this file (10 Mar 10), and fixed a half year later in revision 1.74 (31 Oct 10, see ), but that version never made it to branch 5-6, which was released 22 Sep 10. Apparently, this is a seldomly used function.
i have added just a backport of this change to branch 5-6 of CVS. Hope this helps