Actually, I talked with Damian, and he put together a patch for Contextual::Return that seems to take care of it as well. Before that patch, and with an earlier version of T::C (before you wrapped the isa call with the eval) it used to create a fatal error when Contextual::Return was loaded.

BTW, Test::Class has made my testing soooo much easier and the improvements over the past several months have made it that much more useful. I highly recommend it for testing, especially for large modules and applications.