http://bugs.winehq.org/show_bug.cgi?id=22737
--- Comment #5 from Daniel Santos daniel.santos@pobox.com 2010-05-17 02:21:43 --- I should mention that I've tried this on a very dry WINEPREFIX and also one created with the lotrosetup.sh script posted on the appdb page (http://appdb.winehq.org/objectManager.php?sClass=version&iId=19108), which essentially adds this .NET hack to the registry:
[HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v1.1.4322] "Install"=dword:00000001 "SP"=dword:00000001
[HKEY_LOCAL_MACHINE\Software\Microsoft.NETFramework\policy\v1.1] "4322"="3706-4322"
And these winetricks installs: gecko vcrun2005 vcrun2005sp1
I'm running winetricks mono26 to see if it makes a difference right now (big download).