According to this page 5.10.0 is a testing release. It probably means exactly that, this is the release to test your software on in preparation for the 5.10.1 maintenance release.

If you find any bugs or performance problems in perl then report them to perlbug.

In reply to Re: Time to upgrade to 5.10.0? by hipowls
in thread Time to upgrade to 5.10.0? by redhotpenguin

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