Debugging phobos with VisualD

[Igor via Digitalmars-d-debugger]

I seem to have corrupted something within my installation and I 
can't find how to fix it. I am convinced that earlier I was able 
to setup a breakpoint within some phobos module that I used and 
step through phobos code from my project but that doesn't work 
any more.

Does anyone know how I can make that work again?