If there's one thing as a module author I wish there was, it would be a clear refernce to the changes in the different versions of perl and the core modules. I know about perldelta and such, but it's a big list. Maybe a clever search engine or something. Ever try to get a clear cut answer on what features of MakeMaker you can depend on? Ever wonder if Symbol::qualify_to_ref() is working on 5.4.0? You know that bind() on a UDP socket can' t be used to set the local address on port under perl 5.00503 and FreeBSD-4? The list goes on, and I have a headache.