So lately my papyrus logs have been spammed to hell and back with property errors in WeaponRackActivateSCRIPT. This hasn't ever happened to me before until late, and the only changes I've made that could possibly touch upon it are the Lost Wonders of Mzark mod and the recent updates to the unofficial patches.

I don't think it's the patches causing it, but from what I've researched, it's not Mzark either. Regardless, whatever the error is, it's taking USKP into account, as some of the property errors have USKP listed in the front. I'm not sure what to make of it, but a couple minutes of gameplay (not even five minutes) is generating a papyrus log that's anywhere from 5000kb to 8000+kb, and roughly 90% of it is things like thus:

[08/31/2013 - 11:45:31PM] warning: Property ArmorMaterialDaedric on script WeaponRackActivateScript attached to  (000CAA2B) cannot be initialized because the script no longer contains that property[08/31/2013 - 11:45:31PM] warning: Property ArmorShieldofYsgramor on script WeaponRackActivateScript attached to  (000CAA2B) cannot be initialized because the script no longer contains that property[08/31/2013 - 11:45:31PM] warning: Property DA15Wabbajack on script WeaponRackActivateScript attached to  (000CAA2B) cannot be initialized because the script no longer contains that property[08/31/2013 - 11:45:31PM] warning: Property USKPWeaponRackWeaponDisallowedMESSAGE on script WeaponRackActivateScript attached to  (000CAA2B) cannot be initialized because the script no longer contains that property

Can you explain to me what could possibly be happening? Whatever it is, it's using the USKP to exacerbate an already huge problem. I'm getting crashes upon exiting an interior anywhere between seconds to minutes, and this is what my logs tell me.

Hi RD,
I believe Arthmoor and the Unofficial crew said that you might get a lot of one-time Papyrus spam, but that it goes away.
So you're using the very latest USKP v/1.33c ?
Are you certain your order is good (BOSS sorted)?

You might consider a post in the Skyrim Mods forum, where they will see it.
(This forum is more useful for PC hardware and hardware configuration issues...)
They will probably know about the Mzark thing, too.

Yes, I'm up to date and I have everything sorted. I'm also not using any unauthorized USKP extensions like the Nexus download warns against. I find it unlikely that Mzark is the issue just as much as I find USKP itself the issue. That said this'll probably get moved to the mod section like my LAST Skyrim problem, which wasn't mod-related anyway. No point in making a second thread if this gets moved there anyway.

And one-time Papyrus spam doesn't seem to matter, because it's generating at least 5000kb in a single file even if the game crashes upon loading (which it has done frequently). And if it does load, it won't be for long, because shortly afterward the game will crash, presumably from a scripting [censored]-up. I have gone back to earlier saves when the problem wasn't appearing, only for it to start cropping up once more. I've posted the same issue in the USKP comment thread as it IS touching upon USKP properties, but I've yet to get a response there.