Everyone who uses perllib please be aware of the updates in API. See the man pages ("fvwm-perllib man") and examples in tests/perl/README.
However the basic old API (for main classes) should continue to work, i.e. for example addHandler or eventLoop are automatically dispatched to the canonical add_handler and event_loop methods. I didn't touch FvwmTabs on purpose, to demonstrate that most of the old API continues to work. Anyway, it is better to update user modules. Regards, Mikhael.