Monodevelop and nunit integration

Question

I have been using MonoDevelop since several years, but now I have a problem with the NUnit plugin.

I started a new simple project with few tests ... The binary was tested without problems with nunit-console, but when in MonoDevelop I get a NullReferenceException and the stack trace reports an error in System.Runtime.Proxies. RealProxy.PrivateInvoke etc.

I am running Ubuntu 11.10 with a 64 bit processor. I have no problems on Windows (how is this possible?) Or on Mac laptops (this is normal!).

Regards, Giacomo