Alright, I have an update. I am just not sure anymore.
Basically, I am editing the whole ghost lands. I removed most of the .m2 on it - everything fine. I was at the point that I spawned two .wmos on it (both with the exact direction - both .wmos from the Bloodelf buildings, namely the Arcan Sanctum and it's upper part). It still worked. However, after I began some massive editing of the textures (namely, the bordering between the eversong wood and the ghostland), I saved them, loaded them up and could see from far away that the changes worked, but when I am slightly nearing them, it crashes with the same error I named previously in this thread.
To give some informations. I am using Noggit SDL 1.1, World of Warcraft 3.3.5a, had no custom patch in it, started off "clean" adts, added no custom additions, etc.
I am using the noggit config method to get noggit running - it had starting up issues that the config fixed. Log is basically what I wrote early in this thread - no error, no warning, nothing out of the unusual. I am uploading the adts as we speak. I hope someone might be able to help me.
EDIT:
http://www.mediafire.com/?s612qu9tmm2i4kn