I already have done :)

the many joys of find ./ -type f -exec grep -l "FormGenerator" "{}" ";" :p

It did occour to me that it might be something like that, I've also recently made a modification so that the base module is now FormGenerator::Base just in case it was suffering from mod_perl's module loading order quirk (since FormGenerator::List is normaly accessed first) but that came up blank :(