I actually read through the ImpeREAL Unique Forts thread to check if this was an already existing issue with it, after coming across that nexus thread searching google. Since I don't use Better Cities that nexus thread I linked to doesn't really apply, so it could be a new conflict. I had Unique Forts up near the top of my load order, so I'm going to try going by that area again with it at the bottom of the load order to see if it goes away. From there it's probably just isolating what mod is causing the conflict, but like I said I have very few mods that affect land in any way so it's kind of a surprise. The only thing I can think of is WAC. But I'll definitely post in the Unique Forts thread if it turns out to be part of the cause and if I can isolate the exact problem. Thanks for noticing my somewhat random comment about it and being on top of it!

A giant land tear between Bravil and Leyawiin is probably one of the known landscape hole bugs. The most recent UOP Supplemental update should take care of that, though you may need to go hide and pass time until the cells reset before it's truly fixed.

Oh, okay thanks, I'm getting the latest update now. February 3 seems pretty close to when I first got the supplementals (remember when you spotted the UOP at the end of my load order and had a good laugh? whenever that was), but I'm pretty sure it was before then, so maybe the update will fix things. And actually this isn't the first time I encountered a tear between Bravil and Leyawiin, though I think the first time it was in a different location. Can't... remember.... gghh

EDIT: Also hooray for slipping this into a bastard thread making it unnecessary to start a new one for my problem!

Hmm, that doesn't explain why the guy on the Tesnexus thread was able to solve the problem by removing ImpeREAL though. But I suppose it could have been because of dirt edits; I removed quite a few when I updated the mod.

Also, I managed to misspell the last word of my last post as 'you' rather than 'yet'. Which comes out comically accusingly when I read it through. Whoops.

Sure it does. The problem disappears as soon as you drop to the desktop and reload. Removing the forts mod was incidental and had nothing to do with it. Provided it wasn't a dirty edit as you say, like maybe one that stepped all over Bravil Barrowfields or something, but it didn't sound like that. Plus the Nexus thread is a year old, and nobody yet knew the cause of the landscape hole bug.