The code has been the same for a very long time we convert line returns etc. You sure you where not using the use html switch in reviews in admin options and turned this off?
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Essentially I asked you wow the old code looked in the database. There is no bug here if our current code works correctly as shown. You have an issue with an old comment but to know if there is anything I can give to you as a tweak I need to know how that comment is stored.