Several features we develop for upcoming RT releases (4.2 and newer)
require changes in DBIx::SearchBuilder module. This is major
component of the system. Best Practical wants to keep new versions
of the module compatible with old RT releases. It’s important as
SearchBuilder releases can fix bugs and improve performance for old
RTs as well.
We packaged a development version and would love to see it tested
on 3.8.0 and newer releases. We already know that RT 3.6 is not
functioning properly with it. Download it from the CPAN  and
perform the following commands:
tar -xzvf DBIx-SearchBuilder-1.59_01.tar.gz cd DBIx-SearchBuilder-1.59_01 perl Makefile.PL make make test sudo make install
Stop and start web server for changes to take effect. Test for a while
report back how it goes, don’t forget to mention RT version.
Best regards, Ruslan.