Also experiencing problems with textures failing to load here. Just yesterday in fact. I was in Ered Luin, in Kheledil docks area, and in the spider den in the back of Rath Teraig. All kinds of textures were failing to load. Trees, bridges, etc.
Fortunately, the issue is rare enough that it hasn't caused me to bang my head into the keyboard. Or play another game. Yet. And I knew what was happening, so I played around it for a bit.
An hour later, no problems whatsoever.
My guess is that there is some lazy loading (software term) going on, and it is failing very consistently at times for some unknown reason.
Viniel, 100 Minstrel -- Tokomak, 100 Guard -- Valwin, 100 Captain -- Vinlad, 100 Burglar -- Vinius, 100 Champion -- (and others)