I had a hunch and tried disabling the "Crew Exp Extended" tick box and this has worked, I now have barracks displaying my crew again, so I'm quite certain this is what's causing the problem.
I fully appreciate that this item comes with a warning in your installer so I have no hard feeling towards you, I selected this at my own risk... however by calling out the issue I suppose now you have an understadning of the impact of some computers/players.
I have had this tick box enabled for some time, as long as it has been available within your mod pack... I can only speculate that the author has made an update (I seem to recall the icon representing battles changed recently) and so this has a side effect of killing my barracks.
I just had a quick look at your change log and I suspect the problem may have been introduced in 4.2.24 here:
v4.2.24 (09-03-2015):
- updated WoT Region Changer v3.2
- updated HARDscope v11.6 [in-game settings works again]
- updated Direction indicator extended v1.06
- updated Vehicle Exp Extended v2.0
- updated Crew Exp Extended v3.04
- updated Detailed Tank Tooltips v1.01
- removed Real Time Battle Awards (RTAN) [suspected for ctd's and live wrecks]
I'll do without the Crew Exp Extended mod for a while, I think I prefer to see my crew in my barracks.
I really, really love this mod pack and completely understand that you do a lot of work to make a great installer/config GUI using the mods of so many different authors, it's a great achievement getting them to all work in harmony :D