DevMan Nirvana

I have the same problem for a few days now. But once I log in everything is normal. Then after teleporting around a little, all unloaded textures become black till they are loaded. I very much suspect that this is related to the Viewer 2.0. Probably when you have both installed. Maybe it would help to deinstall one or if you didn´t use it yet, install it and start using it.