Figuring out exactly which versions are binary-compatible is not easy - even within a major version, eg 5.8.x, there are incompatibilities. In particular with 5.8, I believe that there are incompatibilities both upwards and downwards between 5.8.0/5.8.1/5.8.2.

So a good rule of thumb is to simply not mix versions of perl at all.

In reply to Re^2: Symbol lookup error by DrHyde
in thread Symbol lookup error by Anonymous Monk

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