There is still a problem with Jraenar AI - it uses DUC 1 as a primary weapon on Attack Light Cruisers. I think I mentioned this before and was under impression that PvK fixed it.
Jraenar' major weapon is MB, it never research APB or high level DUC, but attack light cruiser design has weapon selection "1" (APB) and "25" (DUC). It _must_ be changed to "3". I think there are few more AIs with this bug.