To answer my own question, the problem comes from first doing the member list hack then the WOL hack and following instructions *exactly*.
You see there are a few lines that get added during the member list hack (wordlets mods)that DO NOT need to be added again for the WOL hack. If you don't see that these lines have already been added and add them again, well ... you get trouble.
So new rule of thumb for me is for any code insertions, make sure it isn't there already.
