When loading quicklisp-slime-helper in LispWorks Mac 64 bits from the latest quicklisp ditribution, the following error is raised:
Error: External format (:UTF-8 :EOL-STYLE :LF) got error reading #<STREAM::EF-FILE-STREAM /Users/camille/quicklisp/dists/quicklisp/software/slime-20131211-cvs/ChangeLog>: second byte 115 of a sequence is not a continuation byte.
1 (continue) Try loading /Users/camille/quicklisp/dists/quicklisp/software/slime-20131211-cvs/swank-loader.lisp again.
Saving the ChangeLog file again with UTF-8 encoding solved the problem.
I'll take a look, thanks for the report.