Recommendations on WPF Drag & Drop library

I'm using GongSolutions.Wpf.DragDrop library now. It works with MVVM, supports multiple selections,开发者_C百科 works with TreeViews... But it has a few annoying bugs. And it has not been updated since Dec 2009.

Any alternatives?

Edit: Changed title for better description.

One way to go is to fix the bugs. It's open source, so it might be worth it (especially if it's baked into your code base already).