Doom Builder 2 is a .Net 2.0 application which used to work fairly well in Wine 1.3.36 and .37 (appdb entry (http://appdb.winehq.org/objectManager.php?sClass=version&iId=12221)). Now with 1.4, the app still installs fine (after winetricks dotnet20) however opening a map displays an error "Unable to initialize Direct3D video device" and the following terminal output: Code: Initializing graphics device... err:d3d:context_create wglSwapIntervalEXT failed to set swap interval 0 for context 0x200cc8, last error 0x591 Any ideas? If you need a wadfile to test, you can get one from the GPL-licensed Freedoom (http://www.nongnu.org/freedoom/).