Main part of the SoD team is currently testing v5, it's probably why they don't find time to fix the bugs in their v4.5 presentations or quests. Kuba is rumored to also prepare an adaptation of Star Wars episode 1, using his famous army of clones feature (codename bug 8 ), and if Mordachai disappeared since some weeks it's because he has some advance and even started to code SoD v6.1 in his secret base under the Python Island. About v5 I think Von just delayed the release because he has some problem balancing the magic system of the new Undead Invasion for the lich character class, but considering the new game is already made (note that it won't be compatible with Mount and Blade, as the new system is turn based) and Microsoft promised us to release an Operating System capable of handling it without crashes in the coming months, we can talk of a very near future.
Unfortunately I can't say more, Cyclo and I continuing to work on 4.5 (me only part time, as I'm of course going to release auxiliarii v2 soon) as we still have trouble installing the Warband module system nijis sent us some months ago.