By any chance, do you still have that installer of road kill. The newer version isn't working for me either and i lost my old one.OK, so if anyone is interested, while organizing my hrd drive, i installed an older version. And it is working fine.
I couldn't find an older version on internet. Btw i am working on maya 2013 , with no service pack installed.
About the test; it seems like no matter what your selection is while using new version, it just cuts the obj the same way. You get the same result...
results ;
Attachment 55326
Attachment 55327
Attachment 55328
Attachment 55329
Attachment 55330