I have heard those claims, but the data I deal with is usually quite simple, just hashes/arrays/scalars/simple objects, no code refs or the likes. So it looks accurate enough for me.
Could you be more precise and give us examples of the kind of data that causes problems with the module?
As a side note I exchanged a couple of emails with ingy when I wanted to patch the module, and he was most helpfull.
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