[Mono-osx] NUnit problems with 1.9

[Frank Mantek]

I recently upgraded to 1.9, and now, when i run my unittests under  
Leopard, i get:

Google.GData.Client.UnitTests.CoreTestSuite.TestTokenCollection :  
System.Configuration.ConfigurationErrorsException : Type  
'System.Configuration.SingleTagSectionHandler' not found. () ()
  at System.Configuration.InternalConfigurationHost.GetConfigType  
(System.String typeName, Boolean throwOnError) [0x0002b] in /private/ 
tmp/monobuild/build/BUILD/mono-1.9/mcs/class/System.Configuration/ 
System.Configuration/InternalConfigurationHost.cs:77
  at System.Configuration.ConfigInfo.CreateInstance () [0x0000b] in / 
private/tmp/monobuild/build/BUILD/mono-1.9/mcs/class/ 
System.Configuration/System.Configuration/ConfigInfo.cs:50
  at System.Configuration.SectionInfo.CreateInstance () [0x00000] in / 
private/tmp/monobuild/build/BUILD/mono-1.9/mcs/class/ 
System.Configuration/System.Configuration/SectionInfo.cs:63
  a\


The tests were running fine before, and the same tests run under  
VS2005 on a windows machine with the same config file. I searched for  
answers using the usual tools, but can not find anything easily that  
would explain this. I verified (as far as i could) that the config  
file looks valid to ensure that this is not just a "forgiving" runtime  
on the windows platform.

Any hints? I am darn sure this is something braindeadly stupid....

Frank Mantek