That wasn't my experience. After I finally got all the files in place it worked out OK for my initial test runs. But as soon as I tried to add the objects I actually wanted to display I started getting all sorts of error messages and alot of my LOD textures were coming out completely distorted. Several tries after that I finally gave up in disgust.
I Don't know your system or, if you simply missed a file. When, I was getting errors, I would read them and, trannslate them into the files I didn't place. Once it was all set up right it worked like a charm. Yes, it takes some time and, a lot of patients. :brokencomputer:
Oh its correct, but not on Every computer. I have seen many folks with the issue post about it, and I too have it. Again not a major issue.

I'm sure Miax's is correct. I get this issue when I resize my render window with a cell open. As Miaximus has said the GECK is not bugged it's just simply glitchy, Built to be used on a specific system, by people who know it's limitations. Now that it's distributed to all of us with our random graphics cards, processors and, ram. how could you expect it to work like say, Photoshop which you pay $600 + for?
The GECK can be annoying but, if I'm able to run it on a Mac, (Running Vista on a Bootcamp Drive,) with limited errors, Pulling off LOD over 13 times, it can't be all that bad.
When you run into trouble simply come to the community! ( I do! ) There are tones of competent modders out there willing to lend a hand. This is where you'll get the help you need.
If you simply give up, well I have to call you a wimp or even a P***Y! :drool: ( simply making a bad joke! :facepalm: )