Can't create dynamic plugins in current Alpha

which is version
vvvv 45alpha29.3 - b356929bbb
03/04/2013 18:30.

Just in case you missed it.
Error message:

00:00:30 ERR : System.ArgumentNullException in System.Core: Value cannot be null.
Parameter name: source

Stacktrace:
   at System.Linq.Enumerable.Select[TSource,TResult](IEnumerable`1 source, Func`2 selector)
   at VVVV.Core.Model.MsBuildProject.SaveTo(String projectPath)
   at VVVV.Hosting.Factories.CSProjectFactory.CloneNode(INodeInfo nodeInfo, String path, String name, String category, String version, String& newFilename)
   at VVVV.Hosting.Factories.AbstractFileFactory`1.Clone(INodeInfo nodeInfo, String path, String name, String category, String version, INodeInfo& newNodeInfo)
   at VVVV.Hosting.HDEHost.Clone(INodeInfo nodeInfo, String path, String name, String category, String version)

i missed it. thx. should work again.