Post code “correction”

Hello, I upgraded my WP blog from 2.2.1 to 2.2.2 and I have following problem.

When I want to edit some post, WP automatically correct my code (replaces div for p, upcase atributes etc.). Option “Writing > WordPress should correct invalidly nested XHTML automatically” is allready off, but that correction is still “working”.

Please give me advise how to turn it off.