Please test again with the latest ASDF and tracing uiop/run-program::%system with two colons.
https://dl.dropboxusercontent.com/u/19667598/asdf-failures/3.1.0.73/clisp-te...
https://dl.dropboxusercontent.com/u/19667598/asdf-failures/3.1.0.73/sbcl-tes...
Also running both these again now from local Windows filesystem.