Since this commit:

commit bdd3cecf1bb53fe147b3c967b2356f9b28fad451
Author: Mark Cox 
Date:   Sat Dec 8 15:47:04 2012 +1000
    CFFI-GROVEL now uses ASDF operations to compile and load processed grovel and wrapper files.

static-vectors will not load after cffi-libffi:

   (ql:quickload :cffi-libffi)
   (ql:quickload :static-vectors)
   The slot CFFI-GROVEL::GENERATED-LISP-FILE-TYPE is unbound in the object #<CFFI-GROVEL:GROVEL-FILE "static-vectors" "ffi-types">.

There is no problem with the previous commit, 32170642e829.  I have static-vectors-1.4 from quicklisp.

Liam