Dan,
from AOLSERVER.INSTALL of Search-OpenFTS-tcl-0.3.1:
3. Build aolserver module:
        tar xvzf openfts-tcl-0.3.tar.gz
        cd openfts-tcl-0.3
        ./configure --with-aolserver-src=DIR
        cd aolserver
        make
        cp fts.so [aolserver bin directory]
        cd ..
-->     cp fts_*.tcl [aolserver tcl lib directory]   <--
I was thus under the impression that the openfts-driver sourced 
the files in the AOLServer Tcl lib directory and not the
files in usr/local/Search-OpenFTS-tcl-x.
/Bart