http://bugs.winehq.org/show_bug.cgi?id=22588
--- Comment #23 from Florian florian@fkoeberle.de 2010-05-12 15:21:49 --- Ubuntu 10.04 offers me to install two old versions of nvidia drivers.
Version 173 shows the same editor behavior like the most current version.
With version 96 however the terrain editor does not freeze: Instead it shows a ton of shader related error messages in the console and the 3d area of the terrain editor is black.