rdmd only works with files in current directory on Windows?

[simendsjo]

c:\temp\src\test.d

c:\temp>rdmd src\test
The system cannot find the path specified.

c:\temp>rdmd src/test
std.file.FileException: (...)\.rdmd\rdmd-src/test.d-(...): The system 
cannot find the path specified.

Using rdmd 20090902, dmd 2.048 and 64 bit win7