rdmd executable location

[CrypticMetaphor]

If I run it with the rdmd version that came with the compiler, nothing 
special happens, it just compiles and runs the code, the executable 
doesn't end up in my current folder. ( rdmd build 20100913 ).

If I run it with the compiler version of this code (rdmd build 20101215):
http://dsource.org/projects/phobos/browser/trunk/tools/rdmd.d

I get an assertion error on line 51, so that doesn't work either.