I don't believe so, SQLNET remains the same. I've heard of issues upgrading to 9i, but not within 8i.

Originally posted as a Categorized Answer.

In reply to Re: Does DBI/DBD break when upgrading Oracle from 8.1.6.3 to 8.1.7.3? by metadatum
in thread Does DBI/DBD break when upgrading Oracle server or client? by bugdiver

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