Yes. The need for CPAN to not upgrade was realized after 5.6.0 was released, so both 5.005_03 and 5.6.0 are buggy.

But 5.6.1 should have the correct version.

To see if you do you can try "perldoc -m CPAN" and look for the word, "isaperl". If you find it, then you have the test.

And in answer to another person's note, the correct way to handle it is to first upgrade just CPAN (which does not have any forward dependencies but does have the fix) and not Bundle::CPAN (which includes packages with forward dependencies). Once that is upgraded, you can upgrade more packages at will.