5.6.1 is completely unsupported. It is dead. It is so entirely dead that if a security flaw allowing privilege escalation was uncovered, the most likely reponse from the Perl 5 Porters would be to recommend you upgrade.
It's unsupported in the sense that there is a 5.6.2. There was a posting on #p5p today that someone is planning to make a 5.6.3 release. So, I wouldn't say that the 5.6.x branch is entirely unsupported. But yes, 5.6.1 is as unsupported as 5.8.8 is. And for the same reason.

In reply to Re^2: qr bug in perl 5.6.1 with lexicals by JavaFan
in thread qr bug in perl 5.6.1 with lexicals by Anonymous Monk

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