Hello Daniel,
soon I will start preparing the 1.5.4 and 1.4.5. The only issue reported and not clarified yet is the tcp failover that I tried to reproduce today without luck, might be dependent of (triggered faster on) particular architecture. It can be fixed once gathering more details or being able to reproduce. If you are aware of something else, please report to devel list.
This was posted near end of year, and nobody responded to Henning's post. Probably got lost in the holiday shuffle.
http://lists.kamailio.org/pipermail/users/2009-December/025782.html
We are currently working around the problem by using another db_mode; so if you want to mark as "wontfix" that's ok. But you asked for any open items.