What I meant is that after issuing:

    (ql:update-all-dists)

which updates to the quicklisp 2015-04-07 distribution set, the execution of:

   (ql:quicklioad "antik")

fails with that message about the reader.

I had thought this was a problem with antik, but it antik hasn't changed, it must be something else.  Maybe a different package (maybe a dependency of antik that's getting pulled in), an issue with quicklisp itself, something peculiar or buggy with my setup, ...